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Silicon Laboratories Inc
Silicon Laboratories Inc_20100114

Silicon Laboratories Inc patents


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

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "S" | Silicon Laboratories Inc-related inventors


Multiple power transmitter for rf receiver or the like

In one form, a radio frequency (RF) transmitter includes an RF signal source, a balanced/unbalanced transformer (balun), and first and second amplification circuits. The balun has a primary side adapted to be coupled to an antenna, and a secondary side. The first amplification circuit has an input coupled to the... Silicon Laboratories Inc

Compensating for temperature-dependent hysteresis in a temperature compensated crystal oscillator

Hysteresis causes the temperature dependent frequency characteristic of the crystal of a crystal oscillator to be different when the temperature is rising from a previous colder state and when the temperature is falling from a hotter state. A rising temperature-to-frequency mapping polynomial and a falling temperature-to-frequency mapping polynomial are generated... Silicon Laboratories Inc

Synchronous detection circuit and determining a bio-impedance of a biological tissue

Embodiments of synchronous detection circuits and methods are provided for extracting magnitude and phase information from a waveform. One embodiment of a synchronous detection circuit includes a driver circuit, an analog-to-digital converter (ADC) and a controller. The driver circuit is configured to supply an input waveform at an input frequency... Silicon Laboratories Inc

Synchronous detection circuit and extracting magnitude and phase from a waveform

Embodiments of synchronous detection circuits and methods are provided for extracting magnitude and phase information from a waveform. One embodiment of a synchronous detection circuit includes a driver circuit, an analog-to-digital converter (ADC) and a controller. The driver circuit is configured to supply an input waveform at an input frequency... Silicon Laboratories Inc

Compensating for thermal lag in temperature compensated crystal oscillators

A temperature compensated crystal oscillator (TCXO) includes a crystal oscillator and a temperature sensor to provide a sensed temperature. A delay circuit has a selectable delay to delay the frequency compensation based on the sensed temperature. The delay compensates for a difference between when the temperature sensor reflects a change... Silicon Laboratories Inc

Apparatus with partitioned radio frequency antenna structure and associated methods

An apparatus includes a radio frequency (RF) circuit to transmit or receive RF signals, and a partitioned antenna structure. The partitioned antenna structure includes a first portion of a resonator and a first portion of a radiator. The first portion of the resonator comprises less than an entire resonator. The... Silicon Laboratories Inc

Receiver architecture having full-band capture and narrow-band paths

In an embodiment, an apparatus includes: a first receiver to receive and downconvert a first radio frequency (RF) signal to a second frequency signal and to output a first digitized signal, the first receiver comprising a full-band receiver to receive at least a substantial portion of a band of interest;... Silicon Laboratories Inc

System and high speed, high voltage swing electrostatic discharge protection

An ESD protection circuit for an IC having multiple diodes coupled in series between a signal pad and a reference pad including a first diode coupled to the signal pad, a last diode coupled to the reference pad, and at least one intermediate diode. The protection circuit includes a bias... Silicon Laboratories Inc

Apparatus for oscillator with improved precision and associated methods

An apparatus includes a first oscillator to generate an output signal that has a first frequency. The apparatus further includes a second oscillator to generate an output signal that has a second frequency. The second frequency varies as a function of temperature. The apparatus further includes a controller that counts... Silicon Laboratories Inc

Wide range glitchless switchable clock divider with modified 2/3 divider stages

A divider includes 2/3 divider stages that may be turned off without toggling to extend the divide range of the divider while also reducing the impact of spurs on the divider output, and preserving the timing margin to update the divide ratio glitchlessly. A 2/3 divider stage responds to an... Silicon Laboratories Inc

Image rejection calibration with a passive network

In one aspect, an apparatus includes: a mixer to receive a radio frequency (RF) signal and downconvert the RF signal into a second frequency signal; an amplifier coupled to the mixer to amplify the second frequency signal; an image rejection (IR) circuit coupled to the programmable gain amplifier (PGA) to... Silicon Laboratories Inc

Receiver with phy switch based on preamble

A system for automatically detecting the PHY mode based on the incoming preamble is disclosed. The system includes a multimode demodulator, which includes a preamble detector and a demodulator. The preamble detector is used to determine when the preamble has been received and the PHY mode being used by the... Silicon Laboratories Inc

Fully flexible multi-tuner front end architecture for a receiver

In an example, a method includes: in a first mode, causing a first tuner of an entertainment system to receive and process a first RF signal from a first antenna configured for a first band to output a first audio signal of a first radio station and causing a second... Silicon Laboratories Inc

Systems and methods for switched protocol wireless connection

Systems and methods are provided that may be implemented to selectively enable relatively higher data throughput and higher power WiFi bidirectional wireless protocol capability during times of system wireless activity, and to selectively disable the WiFi bidirectional wireless protocol and enable relatively lower data throughput and lower power wireless protocol... Silicon Laboratories Inc

Apparatus for electric current measurement or calibration and associated methods

An apparatus includes an integrated circuit (IC). The IC includes a current source, to sink or source an output current, in response to a control signal, and a switch-capacitor resistor coupled to the current source. The apparatus further includes a controller coupled to derive the control signal from a voltage... Silicon Laboratories Inc

Digital oversampling clock and data recovery circuit

In one aspect, an apparatus includes: a first time-to-data converter (TDC) to oversample a first duration of incoming data and hold the oversampled first duration during receipt of a second duration of the incoming data; a second TDC to oversample the second duration of the incoming data and hold the... Silicon Laboratories Inc

Controlling a reference voltage for a clock and data recovery circuit

In one aspect, a method includes: determining a power mode of a device; setting a first reference voltage level and a second reference voltage level based at least in part on the power mode; and using at least one of the first reference voltage level and the second reference voltage... Silicon Laboratories Inc

Apparatus for low power signal generator and associated methods

An apparatus includes a signal generator. The signal generator includes a voltage controlled oscillator (VCO) coupled to provide an output signal having a frequency. The signal generator further includes an asymmetric divider coupled to receive the output signal of the VCO and to provide an output signal. The output signal... Silicon Laboratories Inc

Vconn pull-down circuits and related methods for usb type-c connections

VCONN pull-down circuits and related methods are disclosed for USB Type-C connections. A device is connected through a USB Type-C connection to a separate device using connections including a CC (configuration channel) pin and a VCONN (connection power) pin. The device pulls down the VCONN pin to ground through a... Silicon Laboratories Inc

Communication apparatus with direct control and associated methods

An apparatus includes a circuit that includes a communication circuit to communicate information via a link using two communication modes. In the first communication mode, the communication circuit communicates information using a communication protocol. In the second communication mode, the communication circuit communicates information without triggering communication using the communication... Silicon Laboratories Inc

System, usb type-c connector and method to transmit encoded data

A system, USB Type-C connector and method are provided herein to transmit encoded data across a USB cable from a transmitter circuit included within a transmitting port of a USB Type-C connector. The method described herein may generally include detecting a voltage generated at a configuration channel (CC) pin of... Silicon Laboratories Inc

Zigbee, thread and ble co-existence with 2.4 ghz wifi

A system and method of minimizing interference and retries in an environment where two or more network protocols utilize the same frequency spectrum is disclosed. A lower-power network controller is co-located with a WIFI controller. The lower-power network controller parses incoming packets as they are received and generates a request... Silicon Laboratories Inc

Leakage tolerant oscillator

A technique for reducing jitter in an oscillating signal generated by an oscillator circuit includes reducing feedback of gate leakage current while increasing electrostatic discharge protection and reducing regulated power supply requirements of the oscillator circuit, as compared to conventional oscillator circuits. A circuit includes a first integrated circuit terminal... Silicon Laboratories Inc

Optical arrangement for power-efficient, low noise photoplethysmographic sensor module

According to one embodiment, a power-efficient, low noise photoplethysmographic (PPG) sensor module is provided herein comprising at least one light emitting diode (LED) and at least one photodetector. The LED is generally configured for emitting light, and is positioned on the PPG sensor module for transmitting the emitted light into... Silicon Laboratories Inc

Removing impulsive noise in a radio

In one example, an apparatus includes: a delay unit to delay a demodulated signal obtained from an input radio frequency (RF) frequency modulation (FM) signal; a filter to filter the demodulated signal and output a filtered demodulated signal; an impulse detection circuit to receive the filtered demodulated signal and detect... Silicon Laboratories Inc

Fully flexible multi-tuner front end architecture for a receiver

In an example, a method includes: in a first mode, causing a first tuner of an entertainment system to receive and process a first RF signal from a first antenna configured for a first band to output a first audio signal of a first radio station and causing a second... Silicon Laboratories Inc

Zigbee, thread and ble co-existence with 2.4 ghz wifi

A system and method of minimizing interference and retries in an environment where two or more network protocols utilize the same frequency spectrum is disclosed. A lower-power network controller is co-located with a WIFI controller. The lower-power network controller parses incoming packets as they are received and generates a request... Silicon Laboratories Inc

Zigbee, thread and ble co-existence with 2.4 ghz wifi

A system and method of minimizing interference and retries in an environment where two or more network protocols utilize the same frequency spectrum is disclosed. A lower-power network controller is co-located with a WIFI controller. The lower-power network controller parses incoming packets as they are received and generates a request... Silicon Laboratories Inc

Over-the-air broadcast bootloader protocol

A system and method of disseminating bootload images through a wireless network are disclosed. The central node, or server, transmits segments of the bootload image using broadcast so that all wireless network devices receive the image at the same time. The server then individually queries each wireless device to determine... Silicon Laboratories Inc

Apparatus for information processing with loop cache and associated methods

An apparatus includes a processor and a loop cache coupled to the processor. The loop cache provides to the processor instructions corresponding to a loop in the instructions. The loop cache includes a persistence counter.... Silicon Laboratories Inc

Apparatus for data converter with internal trigger circuitry and associated methods

An integrated circuit (IC) includes an analog-to-digital converter (ADC). The ADC includes an ADC core circuit integrated in the IC to receive an analog signal, to convert the analog signal to a digital signal in response to a trigger signal. The ADC core circuit further provide the digital signal as... Silicon Laboratories Inc

Dynamic containerized system memory protection for low-energy mcus

A processor, such as a low-cost microcontroller unit, uses a DMA controller to facilitate direct memory transactions between hardware subsystems independently of the CPU. To enable those transactions to be carried out security, gateways are provided to the DMA controller and peripheral bridge. The gateways, which have access to multiple... Silicon Laboratories Inc

Oscillator with dynamic gain control

In one form, an oscillator includes an oscillator core circuit and a dynamic gain control circuit. The oscillator core circuit is for connection to a frequency reference element and provides a first clock signal using a negative gain element having a gain determined by a gain control signal. The dynamic... Silicon Laboratories Inc

Signal processor suitable for low intermediate frequency (lif) or zero intermediate frequency (zif) operation

A signal processor for a radio frequency (RF) receiver includes a signal processing path having first and second programmable gain amplifiers and first and second offset correction circuits. The first offset correction circuit receives a first digital offset correction word and corrects a first offset of the first programmable gain... Silicon Laboratories Inc

Dynamic trigger voltage control for an esd protection device

Circuit configurations and related methods are provided that may be implemented using insulated-gate bipolar transistor (IGBT) device circuitry to protect at risk circuitry (e.g., such as high voltage output buffer circuitry or any other circuitry subject to undesirable ESD events) from damage due to ESD events that may occur during... Silicon Laboratories Inc

07/06/17 / #20170194854

Timing based approach for efficient switched mode power conversion

A DC-DC converter includes a plurality of switches configured to be in a first charging mode until current through an inductor reaches a first current threshold to thereby indicate an end of the first charging mode. Responsive to the end of the first charging mode the DC-DC converter is configured... Silicon Laboratories Inc

06/29/17 / #20170185094

Apparatus for multiple-input power architecture for electronic circuitry and associated methods

An apparatus includes an integrated circuit (IC). The IC includes a power controller, which includes a regulator and a controller. The regulator receives a plurality of input voltages and provides a regulated output voltage. The controller controls the regulator to generate the regulated output voltage from the plurality of input... Silicon Laboratories Inc

06/29/17 / #20170185096

Apparatus for power regulator with multiple inputs and associated methods

An apparatus includes an integrated circuit (IC). The IC includes a regulator to receive a plurality of input voltages and to provide a regulated output voltage to a load. The regulator includes a plurality of voltage regulators that receive the plurality of input voltages and provide the regulated output voltage... Silicon Laboratories Inc

06/29/17 / #20170187199

Apparatus for battery charger and associated methods

An apparatus includes a voltage regulator to regulate a voltage from a power source and to provide an output current at an output. The apparatus further includes a battery charger, coupled to the voltage regulator, to provide a charge current. The apparatus further includes a controller to control the charge... Silicon Laboratories Inc

06/29/17 / #20170187218

Apparatus for digital battery charger and associated methods

An apparatus includes a digital battery charger. The digital battery charger includes an analog-to-digital converter (ADC) to convert a terminal voltage of a battery to a first digital signal. The digital battery charger further includes a digital controller coupled to the ADC to receive the first digital signal and provide... Silicon Laboratories Inc

06/29/17 / #20170187481

Fail safe clock buffer and clock generator

Techniques for generating a fail safe clock signal improves reliability of one or more output clock signals generated based on one or more input clock signals and an internally generated reference clock signal. By continuously monitoring the frequencies of the one or more input clock signals and reducing or eliminating... Silicon Laboratories Inc

06/22/17 / #20170177020

Low frequency precision oscillator

A technique includes using a first oscillator to clock operations of a radio of an integrated circuit (IC). The technique includes intermittently using the first oscillator to frequency tune a second oscillator of the IC.... Silicon Laboratories Inc

06/22/17 / #20170177775

Systems and methods for tracking changes to and identifying layers of intergrated circuit devices

Systems and methods are provided that may be implemented to identify and track layer changes of an integrated circuit (IC) device, e.g., during any one of circuit design, pattern generation, device fabrication and/or chip failure analysis processes. Multiple revisions and variants of different IC layers may be identified and tracked... Silicon Laboratories Inc

06/22/17 / #20170179881

Common-mode impedance network for reducing sensitivity in oscillators

A low-complexity differential inductor and common-mode impedance network for reducing effects of flicker noise in an oscillator output signal have been disclosed. An oscillator includes a planar conductive loop comprising a first terminal, a second terminal, and a center tap. The planar conductive loop is formed from a first conductive... Silicon Laboratories Inc

06/22/17 / #20170179932

Biquad stage having a selectable bit precision

An apparatus includes a plurality of delay elements, a plurality of multipliers and an accumulator to form a biquad stage; and a precision logic circuit. The biquad stage includes feedback paths; at least one feedback path has an adjustable bit precision; and the precision logic is adapted to regulate the... Silicon Laboratories Inc

06/01/17 / #20170155386

Apparatus for offset correction in electronic circuitry and associated methods

An apparatus includes a first field effect transistor (FET) that has a body and is coupled in a circuit. The apparatus also includes a second FET that has a body and is coupled in the circuit. The circuit has an offset because of a mismatch. The apparatus further includes an... Silicon Laboratories Inc

05/18/17 / #20170139844

Asymmetric memory

A computing system includes a central processing unit (CPU) connected to communicate over a bus, a memory configured to have at least three accessible memory storage areas arranged asymmetrically and a memory protection unit (MPU) that receives and controls memory access requests received from the central processing unit and from... Silicon Laboratories Inc

05/11/17 / #20170133931

Slew-rate controlled supply voltage switching

A technique includes switching a supply rail from receiving a first voltage to receiving a second voltage; and regulating a slew rate associated with the switching.... Silicon Laboratories Inc

05/04/17 / #20170122986

Capacitor sensing system

A capacitor sense system includes a pad for coupling to an external capacitor. A current digital to analog converter (DAC) supplies current to charge the external capacitor. A reference capacitor is charged by a current source. A first comparator compares a voltage across the external capacitor sensed at the pad... Silicon Laboratories Inc

05/04/17 / #20170126005

Digital signal transfer between multiple voltage domains

Circuitry and methods are provided that may be implemented to transfer digital signals between multiple voltage domains while some of these domains may be invalid, e.g., such as to transfer a digital signal from a source voltage domain to a destination voltage domain while the voltage of the source domain... Silicon Laboratories Inc

04/27/17 / #20170115677

Low noise reference voltage generator and load regulator

A low-noise voltage reference generator that utilizes internal gain and feedback to generate an output signal having reduced sensitivity to power supply variations and loading conditions is described. A method includes generating a current based on a voltage drop across a resistor. The voltage drop is based on a second... Silicon Laboratories Inc

04/20/17 / #20170110792

Radio-frequency apparatus with integrated antenna control and associated methods

An apparatus includes a first integrated circuit (IC) that includes a first radio-frequency (RF) circuit to process RF signals, a first antenna port to couple to one or more antennas, and a first switch integrated in the first IC and coupled to the first antenna port. The apparatus further includes... Silicon Laboratories Inc

04/13/17 / #20170105177

Reduced power consumption in a wireless network device

Various techniques for reducing power in a wireless network device are disclosed. In some embodiments, software routines within the device are modified to minimize the time during which the analog circuitry in a radio is powered. In some embodiments, the techniques make use of knowledge of implied delays associated with... Silicon Laboratories Inc

04/06/17 / #20170095211

Plethysmography heart rate monitor noise reduction using differential sensors

An apparatus includes a first electromagnetic sensor configured to generate a first sensed signal based at least in part on detection of a first signal having a first wavelength. The apparatus includes a second electromagnetic sensor configured to generate a second sensed signal based at least in part on detection... Silicon Laboratories Inc

03/30/17 / #20170093032

Radio-frequency apparatus with integrated antenna control and associated methods

An apparatus includes an integrated circuit (IC), which includes a radio-frequency (RF) circuit to process RF signals, and a balun that has first and second ports. First and second switches are coupled to the second port of the balun. The first port of the balun is coupled to the RF... Silicon Laboratories Inc

03/30/17 / #20170093342

Apparatus for compensation of electronic circuitry and associated methods

An apparatus includes a multi-stage amplifier. The multi-stage amplifier includes first, second, and third amplifier circuits coupled in a cascade configuration. The multi-stage amplifier further includes first, second, and third compensation networks. The first compensation network is coupled between the output of the third amplifier circuit and the input of... Silicon Laboratories Inc

03/30/17 / #20170093388

Over voltage tolerant circuit

An apparatus includes an integrated circuit, which includes a processor core, a plurality of input/output (I/O) circuits, and a plurality of over voltage tolerant (OVT) circuits. Each I/O circuit is associated with an I/O pad and is associated with an OVT circuit of the plurality of OVT circuits. At least... Silicon Laboratories Inc

03/30/17 / #20170093399

High speed low current voltage comparator

In one embodiment, a voltage comparator circuit includes a first comparator circuit to compare a first voltage and a second voltage and a second comparator circuit to compare the first voltage and the second voltage. The voltage comparator circuit may include charge storage circuitry and positive feedback circuitry. Such circuitry... Silicon Laboratories Inc

03/30/17 / #20170093448

Output driver architecture with low spur noise

In one embodiment, an integrated circuit includes: a first input pad to receive a radio frequency (RF) signal; a radio receiver to process the RF signal and output a digitally processed signal; an analog filter to receive a digital signal via an input signal path and output a drive signal... Silicon Laboratories Inc

03/23/17 / #20170085081

Maximum supply voltage selection

A method includes providing supply voltages to a supply voltage switching circuit that controls routing of the supply voltages to power consuming circuitry associated with the supply voltage switching circuit. The method includes comparing the supply voltages, including using at least one relatively lower precision comparator to compare the supply... Silicon Laboratories Inc

03/16/17 / #20170077823

Soft-start for isolated power converter

Current flowing through an inductor on a primary side of a voltage converter is sensed and compared to a threshold peak current value to determine when to end an ON portion of the voltage converter. The secondary side of the voltage converter supplies an indication of output voltage for use... Silicon Laboratories Inc

03/16/17 / #20170077931

Oscillator with dynamic gain control

In one form, an oscillator includes an oscillator core circuit and a dynamic gain control circuit. The oscillator core circuit is for connection to a frequency reference element and provides a first clock signal using a negative gain element having a gain determined by a gain control signal. The dynamic... Silicon Laboratories Inc

03/02/17 / #20170060120

Horizontal infrastructure handling for integrated circuit devices

Systems and methods are provided that may be implemented to produce customized integrated circuit (IC) device parts together from a common base IC device part that is customized with settings or code to build different unique IC device parts for different purposes that are processed and output together from the... Silicon Laboratories Inc

03/02/17 / #20170063229

Providing multiple power paths in an integrated circuit

An integrated circuit includes: a voltage converter to receive a first supply voltage signal via a first power path and to output a first output voltage signal; and a voltage regulator to receive the first output voltage signal and to output a regulated voltage signal. The voltage regulator may further... Silicon Laboratories Inc

02/09/17 / #20170038327

Systems and methods for humidity measurement using dielectric material-based relative humidity sensors

Systems and methods are provided that may be implemented to improve accuracy of relative humidity (RH) determination from dielectric sensing material-based RH sensors, e.g., by decreasing shift and drift effects and compensating for dielectric material aging to improve RH sensor accuracy. The disclosed systems and methods may be implemented to... Silicon Laboratories Inc

Patent Packs
01/26/17 / #20170024183

Seamless linking of multiple audio signals

In one embodiment, an apparatus includes: a first demodulator to demodulate a digital signal into a first demodulated audio signal; a second demodulator to demodulate an analog signal into a second demodulated audio signal, the first and second demodulated audio signals including common content; and a delay determination circuit to... Silicon Laboratories Inc

01/19/17 / #20170019262

Overvoltage and surge protection in a power over ethernet device

In some embodiments, powered devices, circuits, and methods are disclosed that may include biasing a hot swap switch to couple a capacitor of a DC-DC converter to negative supply node when an input voltage exceeds a threshold and biasing a telephony switch to couple a positive supply node to a... Silicon Laboratories Inc

01/19/17 / #20170019269

Calibration of transceiver

Techniques for reducing error in time-of-flight measurement due to transceiver latency are disclosed. A method includes determining a first indicator of a first latency of a first transceiver of a first system using a first loopback configuration of the first transceiver. The method includes receiving a second indicator of a... Silicon Laboratories Inc

01/12/17 / #20170012787

Power over ethernet powered device configured for low duty-cycle operation

In some embodiments, a powered device includes a powered device circuit, which may include a maintain power signature (MPS) circuit configured to compare a sense current to a reference current. In a first mode, the MPS circuit may be configured to automatically generate an MPS signal when the sense current... Silicon Laboratories Inc

01/12/17 / #20170010660

Apparatus for power consumption reduction in electronic circuitry and associated methods

An apparatus includes a circuit that has a normal mode of operation and a low-power mode of operation. The circuit consumes more power in the normal mode of operation than in the low-power mode of operation. The apparatus further includes a power-supply circuit. The power-supply circuit provides a normal supply... Silicon Laboratories Inc

01/12/17 / #20170012787

Power over ethernet powered device configured for low duty-cycle operation

In some embodiments, a powered device includes a powered device circuit, which may include a maintain power signature (MPS) circuit configured to compare a sense current to a reference current. In a first mode, the MPS circuit may be configured to automatically generate an MPS signal when the sense current... Silicon Laboratories Inc








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