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Realtek Semiconductor Corp patents (2015 archive)


Recent patent applications related to Realtek Semiconductor Corp. Realtek Semiconductor Corp is listed as an Agent/Assignee. Note: Realtek Semiconductor Corp may have other listings under different names/spellings. We're not affiliated with Realtek Semiconductor Corp, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "R" | Realtek Semiconductor Corp-related inventors


12/31/15 / #20150381135

Lc tank capable of reducing electromagnetic radiation by itself and manufacturing method thereof

The present invention discloses an lc tank capable of reducing electromagnetic radiation by itself and the manufacturing method of the same. An embodiment of said lc tank comprises: a first tank area whose boundary is defined by a first part of an inductance; a second tank area whose boundary is defined by a second part of the inductance in which the second part includes a gap; a cross-interconnection structure operable to electrically connect the first and second parts of the inductance and distinguish the first tank area from the second tank area; and at least one capacitance formed inside at least one of the first and second tank areas, wherein the area ratio of the first tank area to the second tank area is between 20% and 80%.. ... Realtek Semiconductor Corp

12/31/15 / #20150381116

Power amplifier and class ab power amplifier

A power amplifier includes a gain stage, an output stage and a first capacitor. The gain stage is arranged for receiving at least a first input signal to generate a first pair of control signals. ... Realtek Semiconductor Corp

12/24/15 / #20150373235

De-noising method and image system

A decryption engine includes an update circuit, a key generator, a decryption circuit and a detection circuit. The update circuit generates a first updating information based on a premise of that a currently received frame is encrypted, and generates a second updating information based on a premise of that the currently received frame is non-encrypted. ... Realtek Semiconductor Corp

12/17/15 / #20150365971

Wireless communication device and method

The present disclosure discloses a wireless communication device and method capable of adaptively permitting packet transmission or adjusting a threshold for packet transmission. An embodiment of said wireless communication device includes a reception circuit, a control circuit and a transmission circuit. ... Realtek Semiconductor Corp

12/17/15 / #20150364429

Integrated circuit having electromagnetic shielding capability and manufacturing method thereof

The present invention discloses an integrated circuit having electromagnetic shielding capability and the manufacturing method thereof. An embodiment of the said integrated circuit comprises: a semiconductor circuit structure including a first surface which covers an electromagnetic radiation area; an electromagnetic shielding layer covering the first surface and including at least one contact; and at least one conducting path operable to electrically connect the at least one contact with a steady voltage and thereby shield off the electromagnetic wave from the electromagnetic radiation area, wherein the current running through the electromagnetic shielding layer is zero or less than the maximum current running through the electromagnetic radiation area.. ... Realtek Semiconductor Corp

12/17/15 / #20150364243

Electronic device with two planar inductors

An electronic device includes a first planar inductor and a second planar inductor. The first planar inductor includes at least a first ring structure and a second ring structure interconnected electrically for generating a first magnetic field having a first direction and a second magnetic field having a second direction respectively, wherein the first direction is different from the second direction. ... Realtek Semiconductor Corp

12/10/15 / #20150358017

Method and apparatus for reducing power bouncing of integrated circuits

A circuit is provided having a core circuit for sinking a first current from a first internal power supply node, a power bouncing reduction circuit for receiving power from a second internal power supply node and sourcing a second current to the first internal power supply node in accordance with a change of voltage at the first internal power supply node, and a package for coupling the first internal power supply node and the second internal power supply node to a first external power supply node and a second external power supply node, respectively. A corresponding method is also provided.. ... Realtek Semiconductor Corp

12/03/15 / #20150350000

Calibration method and calibration apparatus for calibrating mismatch between first signal path and second signal path of transmitter/receiver

A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a receiver is proposed in the present invention, including: utilizing the receiver to receive at least one test signal with a specific frequency via the first signal path and the second signal path, to generate a first signal path received signal and a second signal path received signal; performing frequency analysis upon the first signal path received signal and the second signal path received signal respectively, to generate a first frequency analysis result and a second frequency analysis result; and calculating at least one calibration coefficient according to the first frequency analysis result and the second frequency analysis result. A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a transmitter is also proposed in the present invention.. ... Realtek Semiconductor Corp

12/03/15 / #20150349900

Wideband calibration method and wideband calibration apparatus for calibrating mismatch between first signal path and second signal path of transmitter/receiver

A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a transmitter, including: utilizing the receiver to receive at least a test signal via the first signal path and the second signal path, wherein each test signal possesses a specific frequency within a specific frequency band; calculating at least a calibration coefficient for each test signal respectively, so as to calibrate mismatch between the first signal path and the second signal path of the receiver with respect to the specific frequency corresponding to each test signal; deriving a tap coefficient of a calibration filter of a calibration filter unit according to the at least a calibration coefficient of each test signal; and utilizing the calibration filter unit to calibrate a received signal.. . ... Realtek Semiconductor Corp

12/03/15 / #20150349794

Self-calibrating vco-based analog-to-digital converter and method thereof

A circuit includes an input dispatch unit for receiving an input signal and a calibration signal and outputting n dispatched signals in accordance with a selection signal. The circuit also includes n analog-to-digital converter (adc) units for receiving the n dispatched signals, n control signals, and n mapping tables and outputting n raw data, and n refined data, respectively. ... Realtek Semiconductor Corp

12/03/15 / #20150348702

Parameter-variable device, variable inductor and device having the variable inductor

A device having a variable inductor includes an inductor having an inductance, a first conductor having a first grounding property, and a second conductor having a second grounding property. The device further includes a first single-mesh structure including a first grid. ... Realtek Semiconductor Corp

11/12/15 / #20150326384

Circuit and method for clock data recovery and circuit and method for analyzing equalized signal

A clock data recovery method samples an input signal according to a reference clock to generate a plurality of sampling results. A first and a second sampling clocks are generated according to the reference clock. ... Realtek Semiconductor Corp

11/12/15 / #20150326247

Dictionary-based compression method, dictionary-based decompression method and dictionary composing method

The present disclosure discloses a dictionary-based compression method, a dictionary-based decompression method and a dictionary composing method. An embodiment of said dictionary-based compression method comprises: receiving digital data which include a plurality of data blocks; compressing the digital data according to a multilayer dictionary-based compression algorithm which includes a first dictionary-based compression algorithm, a second dictionary-based compression algorithm and a third dictionary-based compression algorithm. ... Realtek Semiconductor Corp

11/12/15 / #20150324313

Hub control method and associated circuit

A hub hub control method, wherein the hub possesses an uplink port and a plurality of downlink ports, includes: receiving link status of each downlink port to know whether each downlink port has built a link; and when none of the plurality of downlink ports has built a link, controlling the uplink port to be unable to build a link. A hub control circuit, the hub possessing an uplink port and a plurality of downlink ports, includes a link status reception unit and an uplink port control unit for respective execution of the two steps of the hub control method.. ... Realtek Semiconductor Corp

11/12/15 / #20150324308

Solid state drive controlling circuit and related solid state drive device and solid state drive access system

A solid state drive (ssd) controlling circuit and related ssd device and ssd access system are disclosed. The ssd controlling circuit includes: an ahci (advance host controller interface) controlling circuit for coupling with a pcie (peripheral component interconnect express) interface; and a flash memory controlling circuit coupled with the ahci controlling circuit and configured to operably control accessing operations of one or multiple flash memory arrays of a solid state drive. ... Realtek Semiconductor Corp

11/05/15 / #20150318858

Clock generation circuit and method thereof

This invention discloses a clock generation circuit and a clock generation method for generating a clock. The clock generation circuit includes a reference clock generation circuit, which is installed in a chip for independently generating a reference clock; a temperature sensor for sensing an ambient temperature to generate temperature information; a temperature compensation module, coupled to the temperature sensor, for generating a temperature compensation coefficient according to the temperature information; and a clock adjusting circuit, coupled to the clock generation circuit, for generating the clock according to the reference clock and the temperature compensation coefficient. ... Realtek Semiconductor Corp

10/29/15 / #20150312469

Passive auto-focus device and method

A passive auto-focus device and method are disclosed herein. An embodiment of the passive auto-focus device comprises: a focus-searching-range decision circuit operable to compare a range of a variation area of a current scene with a predetermined range and determine a focus-searching range, in which the variation area is defined according to the comparison between the current scene and a preceding scene; a focal-distance-variation decision circuit operable to compare the definition pertaining to the focus-searching range with a first predetermined definition and generate a current step setting value; an image record generating circuit operable to generate first step image records in connection with the focus-searching range while the current step setting value indicates a first step and to generate second step image records in connection with the focus-searching range while the current step setting value indicates a second step, in which the first step is shorter than the second step.. ... Realtek Semiconductor Corp

10/29/15 / #20150311873

Radio frequency power amplifier and method for increasing power added efficiency and linearity

A radio frequency (rf) power amplifier is disclosed. The rf power amplifier includes an impedance transformation circuit, a current unit gain amplifier, and an output match circuit. ... Realtek Semiconductor Corp

10/29/15 / #20150310981

Integrated transformer

An integrated transformer includes a primary inductor and a secondary inductor wherein the primary inductor includes a b turns spiral winding formed by a first metal layer and an a turns winding formed by a second metal layer, wherein the a turns winding formed by the second metal layer and the innermost turns of the b turns spiral winding formed by the first metal layer are substantially overlapped; and the secondary inductor includes a c turns winding at least formed by the second metal layer, wherein the c turns winding formed by the second metal layer of the secondary inductor and a portion of the winding formed by the first metal layer of the primary inductor are substantially overlapped, wherein a is not bigger than b, and a is not bigger than c.. . ... Realtek Semiconductor Corp

10/29/15 / #20150310980

Integrated stacked transformer

An integrated stacked transformer includes a primary inductor and a secondary inductor, and the primary inductor includes at least a first turn and a second turn, and is at least formed by a plurality of windings of a first metal layer and a second metal layer, wherein the first metal layer and the second metal layer are two adjacent metal layers, and the second turn of the primary inductor is disposed inside the first turn; the secondary inductor includes at least a first turn, and the secondary inductor is at least formed by at least one winding formed by the second metal layer, wherein the first turn of the secondary inductor substantially overlaps the first turn of the primary inductor; wherein the second turn of the primary inductor includes a segment of a parallel connection structure constructed by the first metal layer and the second metal layer.. . ... Realtek Semiconductor Corp

10/29/15 / #20150310825

Circuit for generating horizontal synchronizing signal of display and associated method

A circuit for generating a horizontal synchronizing signal of a display includes: a first comparator which is used to compare a luminance signal of a component video connector of the display and a first reference signal to generate a compared signal; a control circuit which is used to generate a first digital controlled signal according to the compared signal; a first digital-to-analog converter which is used to generate the first reference signal according to the first digital controlled signal; a second digital-to-analog converter which is used to generate a second reference signal according to a second digital controlled signal generated by the control circuit, wherein the second digital controlled signal is determined by the first digital controlled signal; and a second comparator which is used to compare the luminance signal and the second reference signal to generate the horizontal synchronizing signal.. . ... Realtek Semiconductor Corp

10/22/15 / #20150303888

Semiconductor device with inductor-capacitor resonant circuit

A semiconductor device with an inductor-capacitor (lc) resonant circuit includes a first insulation layer, an inductor component, and a capacitor component. The inductor component includes a coil-conductor segment and two extension-conductor segments. ... Realtek Semiconductor Corp

10/01/15 / #20150280684

Signal-transmission-line structure and electronic device using the same

A signal-transmission-line structure includes a substrate, a through-silicon via (tsv) trench, a conductive substance, at least a conductor wire, and a dielectric layer. The substrate has a first surface and a second surface opposite to each other. ... Realtek Semiconductor Corp

10/01/15 / #20150277527

Usb hub, control module of usb hub and method of controlling usb hub

This invention discloses a control module of a usb hub. The usb hub utilizes an output switch to selectively output a supplying power through a power supply output and utilizes a capacitor to stabilize a voltage at the power supply output. ... Realtek Semiconductor Corp

09/24/15 / #20150270054

Integrated stacked transformer

An integrated stacked transformer includes a primary winding, a secondary winding and a plurality of bridges, wherein the primary winding is formed by a first metal layer and includes a plurality of segments that are not electrically connected to each other; the secondary winding is form by a second metal layer and includes a plurality of segments that are not electrically connected to each other; the plurality of bridges are formed by a third metal layer. A portion of the bridges is connected to the segments of the primary winding respectively to make the segments of the primary winding form a primary inductor; and another portion of the bridges is connected to the segments of the secondary winding respectively to make the segments of the secondary winding form a secondary inductor.. ... Realtek Semiconductor Corp

09/17/15 / #20150263870

Ethernet network system and method for cancelling common mode signal

An ethernet network system and method for cancelling common mode signal is disclosed. The ethernet network system, with a system frequency, utilizes the delay time point of transmitting data so as to suppress frequency spectrum generated by the ethernet network system. ... Realtek Semiconductor Corp

09/17/15 / #20150263684

Speaker temperature controller and method thereof

An audio device includes a digital-to-analog converter, an amplifier, a speaker, a power management unit and a temperature sensor. The digital-to-analog converter is configured to convert a digital audio signal into an analog audio signal. ... Realtek Semiconductor Corp

09/17/15 / #20150263601

Switching regulator with ripple-based control and method for switching regulator with ripple-based control

A ripple-based control switching regulator comprises a switch, an inductor, a capacitor, an output voltage processing unit and a control unit. Where the switch is utilized to output selectively output a first reference voltage or a second reference voltage as an output voltage according to a control signal. ... Realtek Semiconductor Corp

09/17/15 / #20150262996

Semiconductor device and method of manufacturing same

A semiconductor device includes a substrate, a first trough structure and a second trough structure. The first trough structure which is in the substrate includes a first conductive layer, a first doping layer and a first insulation layer, which is placed between the first conductive layer and the first doping layer. ... Realtek Semiconductor Corp

09/17/15 / #20150262360

Pixel value calibration device and method

A pixel value calibration device comprises: an edge detecting unit to generate edge values according to the target pixel value of a target pixel and the pixel values of neighboring pixels in which the target and neighboring pixels are of a first color and each of them is arranged with pixels of a second color in the same pixel row; a weighted value estimating unit to generate weighted values according to the edge values and an algorithm in which the weighted values are associated with candidate pixels each of which is arranged with pixels of a third color in the same pixel row; a calibration value generating unit to generate a calibration value according to the target pixel value and the pixel value(s) of the candidate pixel(s) plus the weighted value(s) thereof; and a calibrating unit to generate a calibrated pixel value according to the target pixel and calibration values.. . ... Realtek Semiconductor Corp

09/10/15 / #20150256076

Dc voltage generation circuit and pulse generation circuit thereof

A pulse generation circuit for outputting a pulse signal at an output terminal, including: a pmos, an nmos, and a logic circuit. The pmos has a source coupled to a first reference voltage level, a drain coupled to the output terminal, and a gate that receives a first gate control signal. ... Realtek Semiconductor Corp

09/10/15 / #20150256075

Dc voltage generation circuit and pulse generation circuit thereof

A pulse generation circuit, for outputting a pulse signal at an output terminal, comprises a pmos, an nmos and a logic circuit. The pmos has a source coupled to a first reference voltage level, a drain coupled to the output terminal, and a gate coupled to a first gate control signal. ... Realtek Semiconductor Corp

08/27/15 / #20150244367

Method and apparatus for equalizing a level shifted signal

A method and apparatus are provided for equalizing an output of a level shifter so as to obtain a symmetrical transition. In one implementation, a transition equalizing inverter includes: an nmos for establishing a high-to-low transition for an equalized signal in response to a low-to-high transition of an asymmetrical signal; a delay circuit for outputting a delayed signal in response to the asymmetrical signal; and a pmos for establishing a low-to-high transition for the equalized signal in response to a high-to-low transition of the delayed signal, wherein a delay introduced by the delay circuit offsets a timing mismatch between a low-to-high transition and a high-to-low transition of the asymmetrical signal. ... Realtek Semiconductor Corp

08/13/15 / #20150229321

Successive approximation analog-to-digital converter and conversion method

The present invention discloses a successive approximation analog-to-digital converter, comprising: a capacitor array including a designated capacitor and several sampling capacitors to sample an input signal under a sampling mode; a comparator to compare a first voltage from the capacitor array with a second voltage under a comparison mode and thereby generate a comparison result; a switching circuit to determine the charge amount stored in the capacitor array under the sampling mode and the first voltage under the comparison mode according to a control signal; and a control circuit to generate the control signal according to a sampling setting under the sampling mode and generate the control signal according to the comparison result under the comparison mode. Said designated capacitor does no sampling under the sampling mode, but appropriates the charges of the sampling capacitors under the comparison mode, so as to reduce the effective sampling value.. ... Realtek Semiconductor Corp

07/30/15 / #20150215972

Method for establishing networking connection

A method for establishing a networking connection includes: utilizing a mobile communication device to wirelessly communicate with a wireless access point to establish a networking connection between the mobile communication device and the wireless access point; utilizing the mobile communication device to encode a profile of a wireless local area network (wlan) corresponding to the wireless access point to generate one or more profile encoded packets; utilizing the mobile communication device to transmit the one or more profile encoded packets; utilizing a wireless communication device to receive the one or more profile encoded packets; utilizing the wireless communication device to parse the one or more profile encoded packets to obtain the profile of the wlan; and utilizing the wireless communication device to connect to the wireless access point according to the profile of the wlan to establish a networking connection between the wireless communication device and the wireless access point.. . ... Realtek Semiconductor Corp

07/30/15 / #20150215498

Device and method for using an overdrive function to do motion smoothing

A device and method using an overdrive function to do smoothing processing of video data including a frame sequence aabb or aabbb is disclosed in the present invention. The device includes a video information generator and an over drive circuit. ... Realtek Semiconductor Corp

07/30/15 / #20150214936

Negative resistance generator, load including negative resistance and load of amplifier

A negative resistance generator is disclosed herein. The negative resistance generator includes a first signal end for receiving a first signal which includes first ac/dc components, a second signal end for receiving a second signal which includes second ac/dc components, first and second transistors, a power source circuit, a first and a second dc level setting circuits. ... Realtek Semiconductor Corp

07/23/15 / #20150208455

Wireless communication device and method capable of peer-to-peer interconnection

The present invention discloses a wireless communication device capable of establishing peer-to-peer connection passively or actively. The device conforms to an ieee 802.11 standard, and comprises: a control block, a transmission circuit and a reception circuit. ... Realtek Semiconductor Corp

07/23/15 / #20150208026

Pluggable electronic device and method for determining output data of pluggable electronic device

A pluggable electronic device is provided, where the pluggable electronic device is used to connect to a display, the pluggable electronic device is used to generate data complied with a first standard or a second standard, and to transmit the data to the display. The pluggable electronic device includes: a control circuit for generating audio/video signals and control signals; a selection signal generating circuit for generating a selection signal according a determining result indicating whether the pluggable electronic device is connected to an external power source or not; a multiplexer, for receiving the audio/video signals and the control signals, and selectively generating the audio/video signals and the control signals complied with the first standard or the second standard according to the selection signal; and a connector for transmitting the audio/video signals and the control signals from the multiplexer to the display.. ... Realtek Semiconductor Corp

07/23/15 / #20150205907

Systematic defect analysis method and machine readable media

A systematic defect analyzing method, includes: partitioning physical sites into groups to obtain a plurality of groups of physical sites according to a plurality of physical features of a chip corresponding to different potential systematic defects; utilizing a processor to compute at least one defect probability of each group of physical sites; and deriving an analysis result according to the plurality of defect probabilities corresponding to the plurality of groups of physical sites.. . ... Realtek Semiconductor Corp

07/23/15 / #20150204939

Multiple defect diagnosis method and machine readable media

A multiple defect diagnosis method includes: receiving a gate-level netlist of a chip, a plurality of test patterns and a plurality of test failure reports; deriving a plurality of seed nets from the gate-level netlist according to the plurality of test patterns and the plurality of test failure reports; utilizing a processor to compute similarity between the plurality of seed nets, and accordingly merging the plurality of seed nets to obtain a single seed net tree; and deriving at least one suspected seed net according to the single seed net tree.. . ... Realtek Semiconductor Corp

07/16/15 / #20150200644

Emi suppression device and method for network transmission

The present invention discloses an emi suppression device, comprising: a first transformer including a first circuit-end central tap to receive a first circuit signal from two first circuit-end signal taps, and a first cable-end central tap to receive a first cable signal from two first cable-end signal taps; a second transformer including a second circuit-end central tap to receive a second circuit signal from two second circuit-end signal taps, and a second cable-end central tap to receive a second cable signal from two second cable-end signal taps; a first circuit-end inductor coupled between the first circuit-end central tap and a system ground to reduce the common mode noise of the first circuit signal; and a second circuit-end inductor coupled between the second circuit-end central tap and the system ground to reduce the common mode noise of the second circuit signal. Said first and second circuit-end inductors operate separately.. ... Realtek Semiconductor Corp

07/16/15 / #20150198986

Electronic apparatus, functional unit, and power-down method thereof

An electronic apparatus comprises a switch, a processing unit, a functional unit and a power management unit. The function unit has a timer. ... Realtek Semiconductor Corp

07/09/15 / #20150194976

Converter with an additional dc offset and method thereof

A converter with an additional dc offset and method thereof is disclosed in the present invention. The converter includes a switch circuit, a first capacitor, a plurality of additional capacitor cells and an operational amplifier. ... Realtek Semiconductor Corp

07/02/15 / #20150189537

Wireless communication device and method of determining transmission rate of wireless communication device

This invention discloses a wireless communication device and a method of determining a target set of transmission rates of the wireless communication device. The wireless communication device transmits data packets according to a plurality of transmission rates included in the target set of transmission rates. ... Realtek Semiconductor Corp

07/02/15 / #20150189520

Antenna diversity and beamforming coexistence method and machine readable media

An antenna diversity and beamforming coexistence method applied to a wireless communication device which supports both a transmitter/receiver (tx/rx) antenna diversity mechanism and a beamformer/beamformee mechanism includes the following steps: determining whether a plurality of wireless link partners linked to the wireless communication device respectively support the beamformer/beamformee mechanism and generating a determination result accordingly; and determining whether to enable/disable the tx/rx antenna diversity mechanism of the wireless communication device and to enable/disable the beamformer/beamformee mechanism of the wireless communication device according to the determination result; wherein when the beamformee mechanism is determined to be disabled, controlling the wireless communication device to transmit a default value in response to a received beamforming protocol packet.. . ... Realtek Semiconductor Corp

07/02/15 / #20150188694

Multi-lane serial data link receiver and method thereof

A serial data link receiver and method are provided. In one implementation, the receiver includes a first equalizer for receiving a first received signal and outputting a first equalized signal, and a second equalizer for receiving a second received signal and outputting a second equalized signal. ... Realtek Semiconductor Corp

07/02/15 / #20150188494

Active mixer and active mixing method

The present disclosure discloses an active mixer capable of improving linearity while giving consideration to both gain and noise reduction, including: a voltage-to-current converting circuit operable to generate a conversion signal according to an input signal; a switching circuit operable to carry out a switching action according to a clock signal and thereby electrically connect the voltage-to-current converting circuit with a load circuit; the load circuit operable to provide an output signal for a first and a second output nodes according to the conversion signal through the switching action; a first supplement current source, coupled to a first node between the switching circuit and the first output node, operable to supply a first supplemental current to the switching circuit; and a second supplement current source, coupled to a second node between the switching circuit and the second output node, operable to supply a second supplemental current to the switching circuit.. . ... Realtek Semiconductor Corp

07/02/15 / #20150185278

Temperature insensitive testing device and method

The present invention discloses a temperature insensitive testing device comprising: a transmission-end test sequence generating circuit to generate a test sequence; a transmission circuit to process the test sequence according to a transmission clock and thereby generate a test signal; a reception circuit to process an echo of the test signal and generate a digital echo signal; a correlation-value generating circuit to generate correlation values including a maximum correlation value according to the test sequence and the digital echo signal; and a decision circuit to determine whether a relation between the maximum correlation value and at least one threshold satisfies a predetermined condition and thereby generate a decision result, wherein the frequency of the transmission clock is lower than a predetermined frequency which confines the variation of the maximum correlation value to a predetermined range provided that the temperature variation of the transmission cable is within a temperature variation range.. . ... Realtek Semiconductor Corp

06/25/15 / #20150180562

Beamformer and wireless communication method thereof for improving communication quality

A wireless communication method applied to a beamformer includes: receiving a plurality of reference information corresponding to a plurality of stations, respectively; calculating an evaluation value for each of the stations according to at least one reference information of the plurality of reference information; and comparing a plurality of evaluation values respectively corresponding to the plurality of stations, to select specific stations from the plurality of stations for performing beamforming.. . ... Realtek Semiconductor Corp

06/25/15 / #20150180498

Successive approximation register analog-to-digital converter and associated control method

The present invention provides a successive approximation register analog-to-digital converter (sar adc), where a high bit capacitor of the sar adc is composed of a plurality of sub-capacitors, and these sub-capacitors are calibrated when the sar adc is working. Therefore, the working speed of the sar adc will not be influenced. ... Realtek Semiconductor Corp

06/25/15 / #20150180412

Controllable oscillator and method thereof

An apparatus and related method include a voltage-mode biasing network for receiving a reference current and outputting a biasing voltage, and an oscillator core for receiving the biasing voltage and sustaining an oscillation, wherein the voltage-mode biasing network comprises a current-to-voltage converter for converting the reference current into a reference voltage, a low-pass filter for filtering the reference voltage into a filtered reference voltage, and a source follower for receiving the filtered reference voltage and outputting a biasing voltage. The oscillator core comprises a resonator coupled to a regenerative network. ... Realtek Semiconductor Corp

06/18/15 / #20150172705

Window detection device and method on multi-media system

A window detection device and method on multi-media system is disclosed in the present invention. The window detection device includes a sampling unit, a frame buffer, a motion detector and an edge detector. ... Realtek Semiconductor Corp

06/18/15 / #20150171810

Receiver device and method for controlling amplification factor thereof

A method for controlling amplification factor of a receiver device includes: detecting a first variation of an equivalent length of a cable, detecting a second variation of amplification factor of a digital automatic gain controller (dagc), determining a first update value of amplification factor of an analog automatic gain controller (aagc) according to the first variation and the second variation, calculating a tuning ratio of the first update value to a current value of the amplification factor of the aagc, calculating a second update value of the amplification factor of the dagc according to the tuning ratio, updating a set value of the amplification factor of the aagc according to the first update value, and updating a set value of the amplification factor of the dagc according to the second update value.. . ... Realtek Semiconductor Corp

06/11/15 / #20150162960

Mimo wireless communication method and system

The present invention discloses a mimo wireless communication method functioning through a main wireless communication device and comprising: acquiring a transmission opportunity; issuing an distributed mimo initiation frame including a transmission duration, a number ns1 of transmission spatial stream(s), and a number nr1 of reception spatial streams which an intended receiver is operable to process; receiving an initial portion which an attendant wireless communication device sends in response to the distributed mimo initiation frame, or issuing the initial portion after reaching a time limit; and transmitting a distributed mimo packet to the intended receiver while the attendant wireless communication device is allowed to transmit another distributed mimo packet to the intended receiver or another intended receiver concurrently, wherein the sum of the number ns1 and a number ns2 of transmission spatial stream(s) of the attendant wireless communication device is equal to or less than the number nr1.. . ... Realtek Semiconductor Corp

06/04/15 / #20150156048

Carrier frequency offset calibration method

A carrier frequency offset (cfo) calibration method for calibrating a cfo of a receiver is proposed. The cfo calibration method includes: receiving at least one cfo estimation value generated by digital cfo estimation; generating a cfo adjustment value according to the at least one cfo estimation value; and adjusting an oscillation frequency of an oscillator of the receiver according to the cfo adjustment value.. ... Realtek Semiconductor Corp

06/04/15 / #20150156042

Binary signal detection based on non-uniform adc

In an embodiment, a receiver comprises: a linear equalizer for receiving an input signal and outputting a partly equalized signal; a vga (variable-gain amplifier) for receiving the partly equalized signal and outputting an amplitude-adjusted signal in accordance with a gain control signal; a non-uniform adc (analog-to-digital converter) for receiving the amplitude-adjusted signal and outputting a digitized signal; and a dsp (digital signal processing) circuit for receiving the digitized signal and outputting a bit stream by performing a signal detection and establishing the gain control signal by performing an amplitude comparison. The non-uniform adc has a lower precision when the amplitude-adjusted signal lies in a region where the signal detection is of a higher confidence, and has a higher precision when the amplitude-adjusted signal lies in a region where the signal detection is of a lower confidence. ... Realtek Semiconductor Corp

06/04/15 / #20150155955

Calibration method and calibration apparatus for calibrating mismatch between i-path and q-path of transmitter/receiver

A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a transmitter, including: additionally configuration at least one mixer calibration coefficient at a transmitting part of the transmitter; obtaining at least one mixer testing signal from the transmitting part via loopback for spectrum analysis to derive at least one mixer spectrum analysis result; adjusting the mixer calibration coefficient of the transmitting part according to the mixer spectrum analysis result; and additionally utilizing an in-phase signal path finite impulse response filter and a quadrature signal path finite impulse response filter to calibrate mismatches between a low pass filter of the in-phase signal path of the transmitting part of the transmitter and a low pass filter of the quadrature signal path of the transmitting part of the transmitter. A similar mismatch calibration operation may be applied to a receiver.. ... Realtek Semiconductor Corp

06/04/15 / #20150155877

Phase lock loop device with correcting function of loop bandwidth and method thereof

A phase lock loop (pll) device with correcting function of loop bandwidth and method thereof is related to the method including generating an output signal by a pll circuit according to a reference signal and a feedback signal, modulating a feedback coefficient to unlock the feedback signal and the reference signal, detecting two valid crossovers of a phase difference between the reference signal and the feedback signal, calculating an oscillation frequency according to the two valid crossovers, and setting a control parameter of the pll circuit according to the oscillation frequency. The feedback signal is related to the output signal, and there is the feedback coefficient between the feedback signal and the output signal.. ... Realtek Semiconductor Corp

05/28/15 / #20150149743

Management method of virtual-to-physical address translation system using part of bits of virtual address as index

A management method of a virtual-to-physical address translation system includes the following steps: providing a first storage space, wherein the first storage space includes a plurality of buffer entries; providing a second storage space, wherein the second storage space includes a plurality of translation entries, and the translation entries correspond to a plurality of translation indices; and when receiving a write instruction to write a first virtual-to-physical address translation into a specific buffer entry of the buffer entries, storing the first virtual-to-physical address translation in a write translation entry of the translation entries according to a first part of bits of a first virtual address corresponding to the first virtual-to-physical address translation, and storing the first virtual address and a write translation index corresponding to the write translation entry in the specific buffer entry.. . ... Realtek Semiconductor Corp

05/28/15 / #20150146481

Method and apparatus for sensing tunnel magneto-resistance

In one embodiment, an apparatus comprises: an mram (magnetic random access memory) cell array comprising a plurality of mram cells including a calibration cell and a plurality of data cells; a reference mram cell controlled by a control signal; and a sensing-amplifier/latch; wherein: said plurality of data cells are used for storing user data; the calibration cell is used for a calibration purpose; the reference mram cell serves as a reference for comparison with a mram cell selected within the mram cell array; the sensing-amplifier/latch outputs a logical signal based on comparing a resistance of the mram cell selected within the mram cell array and a resistance of the reference mram cell; and the control signal is established in a calibration process by comparing a resistance of the calibration cell with the resistance of the reference mram cell.. . ... Realtek Semiconductor Corp

05/21/15 / #20150139554

Consecutive thin edge detection system and method for enhancing a color filter array image

A consecutive thin edge detection system and method for enhancing color filter array image is disclosed in the present invention. The consecutive thin edge detection system includes a consecutive thin edge detector, a color gradient estimator and a direction indicator. ... Realtek Semiconductor Corp

05/21/15 / #20150139437

Signal processing circuit and associated signal processing method applied to headset

The present invention provides a signal processing circuit and a signal processing method applied to a headset. In the present invention, the signal processing circuit adjusts gain and phase of a left channel signal and a right channel signal to generate a first adjust signal, and a recorded sound from a microphone is added by the first adjust signal to cancel a coupled signal. ... Realtek Semiconductor Corp

05/21/15 / #20150138861

Content addressable memory

This disclosure provides a content addressable memory which includes: a data memory cell for storing a data bit; a mask memory cell for storing a mask bit; and a comparing and readout unit connected to at least one read word line for receiving at least one read word signal, connected to at least one function bit line for receiving a search bit signal, and connected to the data memory cell and the mask memory cell for receiving the data bit and the mask bit; wherein the data memory cell is connected to a data-use write word line for receiving a data-use write word signal, the mask memory cell is connected to a mask-use write word line for receiving a mask-use write word signal, so as to decide whether a write bit signal can be written into the data bit and the mask bit through a pair of write bit lines.. . ... Realtek Semiconductor Corp

05/21/15 / #20150138439

Real-time false color reduction system and method for color interpolation

A false color reduction system and method for color interpolation is disclosed in the present invention. The false color reduction system includes a red/blue color interpolation signal reference level estimator, a red/blue color interpolation signal noise analyzer and a red/blue color interpolation signal noise regulator. ... Realtek Semiconductor Corp

05/07/15 / #20150124983

Circuit and method for driving a loudspeaker

A circuit for driving a loudspeaker is disclosed. The circuit includes: a signal generator connected to the loudspeaker, generating a first signal comprising a first pulse with positive value and a second pulse with negative value; a detection unit connected to the loudspeaker, detecting a second signal produced by the loudspeaker in response to the first signal; and a processing unit connected to the signal generator and the detection unit, calculating the impedance of the loudspeaker according to the second signal; wherein each pulse width of the first and second pulses is between 100 ns and 900 ns.. ... Realtek Semiconductor Corp

05/07/15 / #20150124361

Esd protection circuit

The disclosure provides an esd protection circuit. The esd protection circuit comprises: a clamping unit, a driving unit, a resistance unit, a switch unit, and a capacitance unit. ... Realtek Semiconductor Corp

04/30/15 / #20150117663

Audio codec with audio jack detection function and audio jack detection method

The present invention discloses an audio codec with a jack detection function and an audio jack detection method. An embodiment of the audio codec comprises: a first-contact signal input end operable to electrically connect with a sleeve contact of a plug and receive a first-contact signal indicating the presence or absence of the plug; a second-contact signal input end operable to electrically connect with a ring contact or the sleeve contact of the plug and receive a second-contact signal indicating the presence or absence of the plug; a plug detecting circuit coupled to the first-contact or second-contact signal input end and operable to detect whether a voltage level of the first-contact or second-contact signal has changed to thereby generate a plug detection signal; and a control circuit coupled to the plug detecting circuit and operable to determine the presence or absence of the plug according to the plug detection signal.. ... Realtek Semiconductor Corp

04/30/15 / #20150117635

Network apparatus with multiple communication ports

This disclosure provides a network apparatus with communication ports, each connected to multiple channels, assigned a seed for eliminating the interference among the communication ports, and operable in a master or slave mode, each channel having a communication unit which comprises: an echo canceller, a near-end crosstalk (next) canceller, a decision feedback equalizer, and a control unit configured for controlling the communication ports if the echo canceller and the decision feedback equalizer keep updating their filter coefficients according to the same symbol during a first pre-determined time-interval; wherein when more than two of the communication ports operate in the master mode, the control unit assigns different seeds to the more than two communication ports; and wherein when successive two of the communication ports operate in the slave mode, the control unit stops either the echo canceller or the next canceller from updating their filter coefficients during a second pre-determined time-interval.. . ... Realtek Semiconductor Corp

04/30/15 / #20150116594

Pixel clock generation circuit and method thereof

This invention discloses circuits and methods for generating a pixel clock. The circuits utilize an image signal of a first format to generate a pixel clock, which can be utilized to generate an image signal of a second format. ... Realtek Semiconductor Corp

04/16/15 / #20150103986

Signal transmitting and receiving circuit of digital subscriber line

This invention discloses a signal transmitting and receiving circuit of a digital subscriber line used for transmitting an output signal to a telecommunication loop or receiving an input signal from the telecommunication loop. The signal transmitting and receiving circuit comprises a transformer, which is coupled to the telecommunication loop; a signal transmitting module, which is coupled to the transformer, for generating the output signal; a signal receiving module, which is coupled to the transformer, for processing the input signal; an echo cancelling circuit, comprising passive components and having two ends, one of which is coupled to the signal transmitting module and the transformer, the other is coupled to the signal receiving module and the transformer. ... Realtek Semiconductor Corp

04/16/15 / #20150103676

Method for determining connection status of wired network

A method applied to a wired network including a first network device and a second network device is disclosed. The first and second network devices each include a first set of connection ends and a second set of connection ends. ... Realtek Semiconductor Corp

04/09/15 / #20150098527

Data receiving device and method thereof

This invention discloses a data receiving device and method thereof for identifying a transmission mode of a data signal. The method includes steps of: generating a first reference clock according to a source clock; generating a phase detection signal according to the data signal and a data recovery clock; adjusting the phase of the first reference clock according to the phase detection signal to generate the data recovery clock; generating a second reference clock according to the phase detection signal and the first reference clock, the second reference clock and the data recovery clock having the same frequency and a phase difference; detecting the transmission mode according to the second reference clock and the data signal to generate a mode signal; and deciding whether to change the frequency of the first reference clock according to the mode signal.. ... Realtek Semiconductor Corp

04/09/15 / #20150098359

Network service extension method and device

The present invention discloses a network service extension method and device capable of extending the range of a network service. An embodiment of said method comprises the following steps: establishing a link between a substantial network unit of a wireless network relay device and a wireless network serving device; configuring a virtual wireless network serving unit according to the link setting of the wireless network serving device, so as to make the link settings of the virtual wireless network serving unit and the wireless network serving device the same; establishing a link between the virtual wireless network serving unit and a wireless network demand device; and establishing the connection between the wireless network serving device and the wireless network demand device via the virtual wireless network serving unit and the substantial network unit.. ... Realtek Semiconductor Corp

04/02/15 / #20150092067

Image sharing system and related computer program product

A computer program product includes: a receiving module for utilizing a communication circuit to receive a photographing positions distribution information; an option object generating module for utilizing a control circuit to generate multiple option objects; an arranging module for utilizing the control circuit to generate a graphic user interface including the multiple option objects and one or more reference indicators according to the photographing positions distribution information; and a displaying control module for utilizing a display device to display the graphic user interface. When the display device displays the graphic user interface, if an input device receives a shift command inputted by a user, the display controlling module controls the display device to move at least a portion of the option objects on the graphic user interface toward a same side and to change position or content of at least one reference indicator.. ... Realtek Semiconductor Corp

03/26/15 / #20150085911

Method for equalizing transmission spectrum of a wireless communication transmitter

This disclosure provides a method for equalizing the transmission spectrum of a wireless communication transmitter. The method includes: providing a plurality of single-frequency signals; respectively inputting the plurality of single-frequency signals into the transmitter, wherein each single-frequency signal has a predetermined frequency and all the predetermined frequencies are different from each other; loopbacking the plurality of single-frequency signals to an analog to digital converter so as to generate a plurality of digital loopback signals; calculating a frequency response of the transmitter at base band circuit according to the plurality of digital loopback signals; and equalizing the transmission spectrum of the transmitter according to the frequency response of the transmitter.. ... Realtek Semiconductor Corp

03/19/15 / #20150081951

Memory card access device, control method thereof, and memory card access system

The present invention discloses a memory card access device, the control method thereof and a memory card access system. Said device comprises: a memory card interface circuit to generate card-read data according to a card-read signal or generate a card-writing signal according to card-writing data; a host interface circuit to generate host-read data according to a host-read signal or generate the host-writing signal according to host-writing data; and a control circuit, coupled to the memory card and host interface circuits respectively, operable to generate the host-writing data by processing the card-read data according to a predetermined cache protocol or generating the card-writing data by processing the host-read data according to the predetermined cache protocol, so as to treat a memory card as a cache device.. ... Realtek Semiconductor Corp

03/19/15 / #20150081929

Control circuit and control method for adaptively adjusting parameter setting of pci-e device

A control circuit for a peripheral component interconnect express (pci-e) device includes a power detecting unit and a parameter adjustment unit. The power detecting unit is coupled to a wireless communication transmitter, and arranged to detect a spectrum intensity value of an output spectrum of the wireless communication transmitter. ... Realtek Semiconductor Corp

03/19/15 / #20150078488

Wireless communication apparatus for controlling multi-antenna module and related method thereof

A wireless communication apparatus for coupling to a multi-antenna module comprising a plurality of antennas, the wireless communication apparatus includes: a switching circuit, arranged for selectively changing the connected relations of the plurality of antennas according to a switching signal, so as to make the multi-antenna module generating a plurality of antenna combinations; and a receiving module, coupled to the switching circuit, including: a signal intensity measurement circuit, arranged for measuring signal intensity of a wireless packet received through the plurality of antenna combinations, so as to generate a plurality of measurement results; and an antenna switching determination circuit, during a training state, arranged for choosing a first comparison group comprising at least two antenna combinations from the plurality of antenna combinations for receiving the wireless packet, and determining a better antenna combination according to measurement results of the first comparing group.. . ... Realtek Semiconductor Corp

03/12/15 / #20150071017

Electronic device and control method for electronic device

The disclosure provides an electronic device and a control method for the electronic device. The electronic device comprises: a memory unit, a metal pad, and a control unit. ... Realtek Semiconductor Corp

03/12/15 / #20150069838

Integrated switch-capacitor dc-dc converter and method thereof

An integrated switch-capacitor dc-dc converter and method are disclosed. In an embodiment, a converter includes a switch-capacitor network for receiving a source voltage and outputting a load voltage to a load circuit in accordance with a n-bit control code and a plurality of phase clocks, wherein n is an integer greater than 1, a load capacitor for holding the load voltage, a feedback network for generating a feedback voltage proportional to the load voltage, and a controller for receiving the feedback voltage and a reference voltage and outputting the n-bit control code in accordance with a clock phase of the plurality of phase clocks.. ... Realtek Semiconductor Corp

03/05/15 / #20150067623

Timing analysis method for non-standard cell circuit and associated machine readable medium

A timing analysis method applied for a non-standard cell circuit, includes: identifying at least a first register and a second register from the circuit; calculating at least one path delay of at least one path between the first register and the second register; calculating a first register clock delay from a first clock source to a first register clock input terminal of the first register; calculating a second register clock delay from a second clock source to a second register clock input terminal of the second register; and determining whether timing violation takes place in respect of the second register according to the path delay, the first register clock delay, the second register clock delay, and a first register delay of the first register.. . ... Realtek Semiconductor Corp

03/05/15 / #20150067227

Signal adaptor, signal receiving circuit and associated methods

A signal relaying circuit includes an input interface arranged for receiving an input signal; a displayport (dp) output interface arranged for outputting a dp-like signal, where the input interface and the dp output interface correspond to different interface standards; and a relaying circuit coupled between the input interface and the dp output interface, arranged for relaying the input signal to the dp output interface according to the characteristics of channels, so as to generate the dp-like signal. A signal receiving circuit, signal relaying method and signal receiving method are also disclosed.. ... Realtek Semiconductor Corp

03/05/15 / #20150061787

Method and apparatus for suppressing a deterministic clock jitter

A method for generating an output clock comprising: detecting a timing difference between a first input clock and a second input clock to generate a phase error signal; generating a masked phase error signal by masking the phase error signal based on a deterministic jitter indicator signal; generating an oscillator control signal by filtering the masked phase error signal; and generating the output clock in accordance with the oscillator control signal.. . ... Realtek Semiconductor Corp

03/05/15 / #20150061083

Metal trench de-noise structure and method for forming the same

A metal trench de-noise structure includes a trench disposed in a substrate, an insulating layer deposited on the sidewall of the trench, an inter-layer dielectric layer covering the substrate and the insulating layer, and a metal layer penetrating the inter-layer dielectric layer to fill up the trench. The metal layer may be grounded or floating.. ... Realtek Semiconductor Corp

03/05/15 / #20150061075

Metal trench de-coupling capacitor structure and method for forming the same

A metal trench de-coupling capacitor structure includes a vertical trench disposed in a substrate, an insulating layer deposited on the sidewall of the vertical trench, an inter-layer dielectric layer covering the substrate and the insulating layer, and a metal layer penetrating the interlayer dielectric layer to fill up the vertical trench. The metal layer is electrically connected to a power source.. ... Realtek Semiconductor Corp

02/26/15 / #20150058500

Communication apparatus and related signal receiving apparatus

A communication apparatus includes a host, a signal receiving apparatus arranged to receive a wireless signal, and a connecting device coupled between the host and the signal receiving apparatus. The connecting device is arranged to transmit a transmission signal between the host and the signal receiving apparatus. ... Realtek Semiconductor Corp

02/26/15 / #20150054585

Pre-distortion method, associated apparatus and non-transitory machine readable medium

A pre-distortion method includes: receiving an input data; and obtaining a pre-distortion output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a following power amplifier; and multiplying a reciprocal of a pre-distortion ratio of the output of the power amplifier to the input data by the output of the power amplifier. A pre-distortion apparatus includes a receiver, a pre-distortion unit and a gain compensating unit. ... Realtek Semiconductor Corp

02/26/15 / #20150054424

Protection circuit for use in controlling integrated circuit of light emitting diode

A protection circuit for use in a controlling integrated circuit of a light emitting diode is provided. The protection circuit includes a voltage division circuit and a voltage reduction circuit. ... Realtek Semiconductor Corp

02/19/15 / #20150052181

Parameter generating device and method

The present invention discloses a parameter generating device and the method thereof to generate a parameter for circuit operation in which the parameter corresponds to an n degree polynomial of a characteristic curve while said n is a positive integer. The parameter generating device comprises: a storage circuit to store at least n+1 initial values that are determined by a start value and a unit variation amount; and an parameter calculating circuit, coupled to the storage circuit, to carry out addition calculation for at least [(k−1)×n+1] time(s) if a multiple k is positive or subtraction calculation for at least −k×n time(s) if the multiple k is negative, so as to generate the aforementioned parameter, wherein the multiple k is derived from a difference divided by the unit variation amount while the difference is a current value minus the start value.. ... Realtek Semiconductor Corp

02/19/15 / #20150050900

Voltage regulating circuit and method thereof

A voltage regulating circuit and a method thereof are provided. The voltage regulating circuit includes: a tank circuit, an error amplifier, an output circuit, and a feedback circuit. ... Realtek Semiconductor Corp

02/19/15 / #20150049882

Audio device and audio utilization method having haptic compensation function

The present invention discloses an audio device having haptic compensation function capable of compensating a haptic effect according to a power measuring result and an audio signal. An embodiment of the audio device comprises: an audio signal generating circuit operable to generate an audio signal; a power measuring circuit operable to measure a remaining electric quantity of a power source and thereby generate a power measuring result; and a haptic compensating circuit, coupled to the audio signal generating circuit and the power measuring circuit, operable to adjust a gain of the audio signal or the derived signal thereof according to the power measuring result and thereby output a haptic compensation signal which is used to compensate the haptic effect.. ... Realtek Semiconductor Corp

02/19/15 / #20150049656

Impedance adjustment method, delay capacitance adjustment method and associated apparatus for communication device

An impedance adjustment method for a communication device, wherein the communication device has a plurality of impedance paths for selection, includes: selecting an initial impedance path; and utilizing a predetermined algorithm to examine a portion of the plurality of impedance paths by starting from the initial impedance path for selecting an optimized impedance path for the communication device. A delay capacitance adjustment method for a communication device, wherein the communication device has a plurality of delay capacitance paths for selection, includes: selecting an initial delay capacitance path; and utilizing a predetermined algorithm to examine a portion of the plurality of delay capacitance paths by starting from the initial delay capacitance path for selecting an optimized delay capacitance path of the communication device.. ... Realtek Semiconductor Corp

02/19/15 / #20150049620

Method for estimating cable length in ethernet system and receiver thereof

A method for estimating cable length in an ethernet system and a receiver thereof are applicable to an ethernet system. The method for estimating cable length includes obtaining a channel tap from channel information of a feedback equalizer in the ethernet system and estimating a cable length according to the channel tap, a first coefficient and a constant.. ... Realtek Semiconductor Corp

02/19/15 / #20150049562

Memory control circuit and method of controlling data reading process of memory module

This invention discloses a memory control circuit and method of controlling a data reading process of a memory module. In the data reading process, the memory module transmits a data signal and a data strobe signal used to recover the data signal. ... Realtek Semiconductor Corp

02/19/15 / #20150048885

Gain control circuit and method capable of easing leakage current influence

The present invention discloses a gain control circuit capable of easing leakage current influence. According to an embodiment of the present invention, the gain control circuit comprises: at least one signal input end for receiving at least one input signal; a signal output end for outputting an output signal; an amplifier coupled between an amplifier input end and the signal output end; and a plurality of gain schemes. ... Realtek Semiconductor Corp

02/12/15 / #20150042497

Communication device and method capable of power calibration

The present invention discloses a communication device and a communication method capable of power calibration. Said communication device comprises: a digital circuit to provide a digital output signal; a detection circuit to perform a predetermined detection and generate a detection result; a control circuit to generate a digital-end and an analog-end gain adjustment signals according to the detection result; a digital-end gain adjustment circuit to adjust the gain of the digital output signal according to the digital-end gain adjustment signal and generate a digital gain-adjusted output signal; a digital-to-analog converter to generate an analog output signal according to the digital gain-adjusted output signal; and an analog circuit to adjust the gain of the analog output signal according to the analog-end gain adjustment signal and generate an analog gain-adjusted output signal, wherein the detection circuit is operable to detect the influence caused by a peripheral factor to the analog circuit.. ... Realtek Semiconductor Corp

02/12/15 / #20150042407

Method for detecting frequency offset of oscillator and associated circuit

A method for detecting frequency offset of an oscillator includes: receiving an oscillation signal having an oscillation frequency; generating a self-mixing signal according to the oscillation signal; performing frequency division upon the self-mixing signal to obtain a down-converted self-mixing signal; obtaining a down-converted self-mixing frequency corresponding to a maximum power in a specific frequency range of the down-converted self-mixing signal; and computing a frequency offset of the oscillation frequency according to at least the oscillation frequency and the down-converted self-mixing frequency. A related circuit is also disclosed.. ... Realtek Semiconductor Corp

02/05/15 / #20150035555

Circuit lifetime measuring device and method

The present invention discloses a circuit lifetime measuring device to estimate the rest lifetime of a target circuit, comprising: a reference clock receiving end for receiving a reference clock; a correlation signal generating circuit for providing a correlation signal in which at least some operating settings of the correlation signal generating circuit and the target circuit vary synchronously; a storage circuit for storing an initial relation between the reference clock and the correlation signal; a measuring circuit, coupled to the reference clock receiving end and the correlation signal generating circuit, for measuring a present relation between the reference clock and the correlation signal; and an estimating circuit, coupled to the storage circuit and the measuring circuit, for generating an estimation value according to the initial relation and the present relation, wherein the estimation value indicates the rest lifetime of the target circuit.. . ... Realtek Semiconductor Corp

01/22/15 / #20150022387

Feedforward delta-sigma modulator

A feedforward delta-sigma modulator includes a successive approximation analog-to-digital converter, a digital-to-analog converter, n integrators, a first adder, a second adder, and an optimization zero generation unit, where n is a positive integer. An output terminal of each integrator of the n integrators is coupled to the successive approximation analog-to-digital converter. ... Realtek Semiconductor Corp

01/22/15 / #20150022242

Clock edge detection device and method

The present invention discloses a clock edge detection device capable of detecting the positive and negative edges of a target clock, comprising: a delay circuit for receiving the target clock and transmitting it; a register circuit coupled to the delay circuit for recording and outputting plural target clock levels in accordance with a working clock; a positive edge detection circuit including a plurality of positive edge detectors coupled to the register circuit for detecting the positive edge of the target clock; and a negative edge detection circuit including a plurality of negative edge detectors coupled to the register circuit for detecting the negative edge of the target clock, wherein the positive edge detection circuit is operable to perform a logic operation to the target clock levels while the negative edge detection circuit is operable to perform a different logic operation to the target clock levels.. . ... Realtek Semiconductor Corp

01/15/15 / #20150016579

Clock and data recovery device, sampler and sampling method thereof

A clock and data recovery device, a sampler and a sampling method thereof are provided. The sampler includes a phase generation circuit and a first edge sampling circuit electrically connected with the phase generation circuit. ... Realtek Semiconductor Corp

01/15/15 / #20150016474

Communicating apparatus

A communicating apparatus comprising a receiving module which comprises: a first receiving line, for receiving a second input data stream; a timing detecting apparatus, for detecting timings for a plurality of data units of the second input data stream; a data allocating apparatus, for allocating the second input data stream to x allocated data streams, wherein the x is a positive integer and the x is larger or equals to 2; and x second receiving lines, for respectively transmitting one of the x allocated data streams.. . ... Realtek Semiconductor Corp

01/15/15 / #20150015328

Pre-distortion method and associated apparatus and non-transitory machine readable medium

A pre-distortion method includes: receiving an input data; and obtaining a pre-distorted output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a power amplifier. A pre-distortion apparatus includes a receiver and a pre-distortion unit. ... Realtek Semiconductor Corp

01/15/15 / #20150015271

Detecting circuit and detecting method for determining connection status between first pin and second pin

A detecting circuit for determining a connection status between a first pin and a second pin includes a signal generation unit, a logic unit and a determining unit. The signal generation unit is coupled to the first pin, and arranged for generating a first signal to the first pin. ... Realtek Semiconductor Corp

01/08/15 / #20150010109

Method for compensating mismatch of in-phase signal and quadrature signal of transmitter/receiver

A method for compensating mismatches of an in-phase signal and a quadrature signal of a transmitter/receiver is provided. The method includes: receiving a plurality of test signals to generate two groups of factors, respectively, where each group of factors is applied to two multipliers utilized for compensating a gain mismatch and a phase mismatch of the in-phase signal and the quadrature signal of the transmitter/receiver; then calculating a delay mismatch of the in-phase signal and the quadrature signal according to the two groups of factors.. ... Realtek Semiconductor Corp

01/08/15 / #20150009904

Channel map generation method and apparatus therefor

A channel map generation method includes: performing a power spectrum density detection on a plurality of channels in a frequency band, to generate a first channel map; and performing a first smoothing operation on the first channel map by a first window size to generate a second channel map. The first smoothing operation includes: grouping channels of the first channel map into a plurality of channel groups according to the first window size; and according to the number of good channels or bad channels in each of the channel group, deciding to retain channel determinations in the first channel map of the channel group, or re-designating all the channels of the channel group, so as to generate the second channel map.. ... Realtek Semiconductor Corp

01/01/15 / #20150002325

Self-calibrated delta-sigma modulator and method thereof

A delta-sigma modulator and corresponding method are disclosed. In one implementation, the delta-sigma modulator includes a multiplexer for receiving an analog input signal and a common mode signal and outputting a multiplexed signal in accordance with a selection signal; a summing circuit for receiving the multiplexed signal and an analog feedback signal and outputting an error signal; a loop filter for receiving the error signal and outputting a filtered signal; a quantizer for receiving the filtered signal and outputting a raw digital output signal; a digital-to-analog converter for receiving the raw digital output signal and outputting the analog feedback signal along with a rotated digital output signal in accordance with a phase indicator and a rotation number; and a calibration logic for receiving the rotated digital output signal and a mode indicator and outputting the selection signal, the phase indicator, the rotation number, and a calibrated digital output signal.. ... Realtek Semiconductor Corp








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