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Analog Devices Inc patents
Recent patent applications related to Analog Devices Inc. Analog Devices Inc is listed as an Agent/Assignee. Note: Analog Devices Inc may have other listings under different names/spellings. We're not affiliated with Analog Devices Inc, we're just tracking patents.
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Serial peripheral interface daisy chain mode system and apparatus
Spi frame for simultaneously entering 8 bit daisy-chain mode from 16 bit register addressable mode. Some products that implement spi may be connected in a daisy chain configuration, the first slave output being connected to the second slave input, etc. ... Analog Devices Inc
High dynamic range analog front-end receiver for long range lidar
A system and method for operating a high dynamic range analog front-end receiver for long range lidar with a transimpedance amplifier (tia) include a clipping circuit to prevent saturation of the tia. The output of the clipping circuit is connected via a diode or transistor to the input of the tia and regulated such that the input voltage of the tia remains close to or is only slightly above the saturation threshold voltage of the tia. ... Analog Devices Inc
Apparatus and methods for calibrating radio frequency transmitters to compensate for common mode local oscillator leakage are provided herein. In certain configurations herein, a transmitter generates a radio frequency transmit signal based on mixing a baseband input signal with a local oscillator signal. ... Analog Devices Inc
Feedforward phase noise compensation
Clock systems with phase noise compensation are provided herein. In certain implementations, a clock system includes a phase noise detector for detecting a phase noise of a clock signal, and an adjustable delay circuit for generating an adjusted clock signal based on delaying the clock signal with a controllable delay. ... Analog Devices Inc
The present invention relates to current measurement apparatus. The current measurement apparatus comprises first and second measurement devices with each of the first and second measurement devices being operative to measure current in a respective one of a live conductor and a neutral conductor substantially simultaneously. ... Analog Devices Inc
The present invention relates to current measurement apparatus 100. The current measurement apparatus 100 comprises a measurement arrangement 110, 114 which is configured to be disposed in relation to a load 108 which draws a current signal, the measurement arrangement being operative when so disposed to measure the load drawn current signal. ... Analog Devices Inc
Aspects of the embodiments are directed to systems, methods, and devices for eye gaze tracking. In embodiments, a projective surface, such as a virtual reality display screen or augmented reality projective surface, can project light towards a wearer's eyes. ... Analog Devices Inc
Parameter correction for cascaded signal components
Various examples are directed to systems and methods for providing correction to cascaded signal components. A correction signal may be applied to multiple signal components in a set of cascaded signal components.. ... Analog Devices Inc
Coupled coils with lower far field radiation and higher noise immunity
Micro-fabricated coils are described. In some situations, the micro-fabricated coils include interleaved coils. ... Analog Devices Inc
Anchor tracking for mems accelerometers
A microelectromechanical system (mems) accelerometer is described. The mems accelerometer is arranged to limit distortions in the detection signal caused by displacement of the anchor(s) connecting the mems accelerometer to the underlying substrate. ... Analog Devices Inc
Noise reduction in a voltage converter
This application discusses techniques for reducing the energy of an output ripple in a voltage converter at a switching frequency of the voltage converter. In certain examples, an amplitude of a reference voltage can be modulated with a time-varying random value or pseudo-random value to provide a reduction in the energy of the output ripple at the switching frequency of the voltage converter.. ... Analog Devices Inc
Distributed switches to suppress transient electrical overstress-induced latch-up
Distributed switches to suppress transient electrical overstress-induced latch-up are provided. In certain configurations, an integrated circuit (ic) or semiconductor chip includes a transient electrical overstress detection circuit that activates a transient overstress detection signal in response to detecting a transient electrical overstress event between a pair of power rails. ... Analog Devices Inc
Magnetic sensor position measurement with phase compensation
Aspects of the present disclosure relate to correcting for a phase shift between signals associated with an angle sensor and a multi-turn sensor that includes magnetoresistive elements. A processing circuit can determine a phase shift correction and generate position information based on at least the phase shift correction and a signal associated with the multi-turn sensor.. ... Analog Devices Inc
Common mode feedback circuit with backgate control
A common mode feedback (cmfb) loop for a differential amplifier sense an output common mode of a differential circuit and provides feedback to the gates of tail current transistors. Many cmfb loops cannot easily adjust the output common mode voltage and the output common mode may vary over process, voltage, and temperature. ... Analog Devices Inc
Bias modulation active linearization for broadband amplifiers
A power amplifier circuit for broadband data communication over a path in a communication network can reduce or avoid gain compression, provide low distortion amplification performance, and can accommodate a wider input signal amplitude range. A dynamic variable bias current circuit can be coupled to a common emitter bias node of a differential pair of transistors to provide a dynamic variable bias current thereto as a function of an input signal amplitude of an input signal. ... Analog Devices Inc
Drain-extended metal-oxide-semiconductor bipolar switch for electrical overstress protection
High voltage drain-extended metal-oxide-semiconductor (demos) bipolar switches for electrical overstress protection are provided. In certain configurations herein, an electrical overstress switch embodiment for providing electrical overstress protection, such as electrostatic discharge/electrical overstress (esd/eos) protection includes both a demos device and an embedded bipolar device. ... Analog Devices Inc
Fault suppression or recovery for isolated conversion
A flyback power conversion circuit can be operated by selectively establishing and interrupting a current through a first inductance to store energy. A portion of the energy from a second inductance can be transferred to a storage device to provide an output voltage, where the second inductance is magnetically coupled to the first inductance. ... Analog Devices Inc
Power transfer and feedback across a common isolator
Isolated dc-dc converters are described. A dc-dc converter is a device which converts a direct current (dc) signal from one voltage to another. ... Analog Devices Inc
Depth sensing with multiple light sources
Aspects of the embodiments are directed to a time-of-flight imaging system and methods of using the same. The time-of-flight imaging system includes a light emitter comprising at least one one-dimensional array of laser diodes; a photosensitive element for receiving reflected light from an object; and a light deflection device configured to deflect light from the light emitter to the object. ... Analog Devices Inc
Operational amplifier
The amplifier circuit includes a pair of differential input stages coupled to an output stage where both a selected input stage and an unselected input stage are active with one of either a differential input signal or a reference voltage. A switching network couples a first input differential signal to a first differential input stage and a reference voltage to a second differential input stage when an amplifier input signal is less than a threshold voltage. ... Analog Devices Inc
Devices and methods for smart sensor application
An apparatus comprises a load resistance connectable in series with the electronic sensor to form a series resistance of the load resistance and the internal impedance of the electronic sensor; an excitation circuit configured to apply a predetermined voltage to a circuit element; and a measurement circuit configured to: initiate applying the predetermined voltage to the series resistance and determining the series resistance; initiate applying the predetermined voltage to the load resistance and determining the load resistance; and calculate the internal impedance of the sensor using the determined series resistance and the load resistance, and provide the calculated internal impedance to a user or process.. . ... Analog Devices Inc
Optical charging system with integrated sensor and power receiver
Embodiments of the disclosure can provide an optical charging system with an integrated sensor and power receiver. An electronic device (e.g., a wearable) can include an optical sensor for performing photometric measurements. ... Analog Devices Inc
Packaged devices with integrated antennas
Various embodiments of an integrated device package with integrated antennas are disclosed. In some embodiments, an antenna can be defined along a die pad of the package. ... Analog Devices Inc
Light detector calibrating a time-of-flight optical system
This disclosure pertains to a system and method for calibrating a time-of-flight imaging system. The system includes a housing that houses light emitter, a light steering device, and a photosensitive element. ... Analog Devices Inc
High-voltage unity-gain buffer
Described are various techniques that can minimize the use of high-voltage devices in a unity-gain buffer that can be used in a high voltage application, while providing a circuit that generates an output that is an accurately buffered version of the input.. . ... Analog Devices Inc
Thin optical filter arrays
An array of optical filters having a front side and a back side is disclosed. The array of optical filters includes first and second optical filters and a molding compound. ... Analog Devices Inc
Voltage variable attenuator, an integrated circuit and a method of attenuation
The present disclosure provides a voltage variable attenuator (vva) with a controllable matching network. The output of the attenuation portion of the vva is couple to a matching network. ... Analog Devices Inc
Isolated dc-dc converter with an h-bridge circuit
Isolated dc-dc converters and methods for operating the same are described herein. Dc-dc converters include a driver that drives a primary winding of a transformer to transmit power to a secondary winding of the transformer across an isolation barrier. ... Analog Devices Inc
Method of providing enhanced range accuracy
A system and method can be provided for introducing a varying time delay between a sequence of electrical pulses in a laser range finding system. A laser beam can be modulated with the sequence of electrical pulses. ... Analog Devices Inc
Self-calibrated heavy metal detector
A microfluidic ion detector for detecting heavy metal ions in liquid and particulate matter from gas samples is described. The microfluidic ion detector includes a sample extraction structure for extracting sample ions from a sample liquid or extracting sample ions from the particulate matter of a gas sample, a separation structure for separating sample ions of different types once extracted, and a detection structure for detecting the sample ions. ... Analog Devices Inc
Synchronized mass gyroscope
Micromachined inertial devices are presented having multiple linearly-moving masses coupled together by couplers that move in a linear fashion when the coupled masses exhibit anti-phase motion. The couplers move in opposite directions of each other, such that one coupler on one side of the movable masses moves in a first linear direction and another coupler on the opposite side of the movable masses moves in a second linear direction opposite the first linear direction. ... Analog Devices Inc
Flexural couplers for microelectromechanical systems (mems) devices
Micromachined inertial devices are presented having multiple linearly-moving masses coupled together by couplers that move in a linear fashion when the coupled masses exhibit linear anti-phase motion. Some of the described couplers are flexural and provide two degrees of freedom of motion of the coupled masses. ... Analog Devices Inc
Balanced runners synchronizing motion of masses in micromachined devices
Micromachined inertial devices are presented having multiple linearly-moving masses coupled together by couplers that move in a linear fashion when the coupled masses exhibit anti-phase motion. The couplers move in opposite directions of each other, such that one coupler on one side of the movable masses moves in a first linear direction and another coupler on the opposite side of the movable masses moves in a second linear direction opposite the first linear direction. ... Analog Devices Inc
Spatial digital pre-distortion
Power amplifier circuits can behave in a non-linear manner particularly when operated to produce output signal swings approaching an amplifier saturation region. A pre-distortion signal can be applied to a signal to be transmitted to compensate for such power amplifier non-linearity. ... Analog Devices Inc
Pre-charging circuitry for multiplexer
A pre-charge circuit is provided for pre-charging the input node of a capacitive component to which the multiplexer output is fed to a charge level that is close to or approximates the signal output level of the multiplexer when its output is next switched. In order to reduce the level shifting burden on the amplifier in the pre-charge circuit, each pre-charge circuit input channel has a respective capacitor that is able to be switched in and out of series with the respective multiplexer channels, such that the respective capacitors track the signal levels on the multiplexer channels. ... Analog Devices Inc
Charge injection compensation circuit
A charge injection compensation circuit compensates for charge injection by a field-effect transistor (fet) switch regardless of a supply voltage. The charge injection compensation circuit includes a main switch that injects charge into an electronic circuit when switched off, and a charge storage device that stores the injected charge until it can be dissipated to a dissipating node. ... Analog Devices Inc
Sparse cascaded-integrator-comb filters
In a cascaded integrator comb (cic) filter, a time-varying gain is added before the last integrating stage transforming its sub optimal boxcar impulse response into an fir filter of arbitrary length. Make the coefficients sparse and taking them from a set of small integers leads to an efficient hardware implementation that does not compromise any of the essential cic filter characteristics especially the overflow handling. ... Analog Devices Inc
Systems and methods for synchronous demodulation
Systems and methods for synchronous demodulation using passive sampled analog filtering are disclosed. A system for synchronous demodulation includes an input channel for accepting an input signal, a first passive sampled analog filter for filtering the input signal, a mixer for mixing the filtered input signal and outputting a mixed signal, a second passive sampled analog filter for filtering the mixed signal, and an output channel for outputting the filtered mixed signal.. ... Analog Devices Inc
Active interface resistance modulation switch
In certain configurations, an input/output (io) interface of a semiconductor chip includes a pin, an interface switch connected to the pin, and an overstress detection and active control circuit that controls a resistance of the interface switch with active feedback. The overstress detection and active control circuit increases a resistance of the interface switch in response to detection of a transient overstress event between a first node and a second node. ... Analog Devices Inc
Planar processing of suspended microelectromechanical systems (mems) devices
Suspended microelectromechanical systems (mems) devices including a stack of one or more materials over a cavity in a substrate are described. The suspended mems device may be formed by forming the stack, which may include one or more electrode layers and an active layer, over the substrate and removing part of the substrate underneath the stack to form the cavity. ... Analog Devices Inc
Wake-up wireless sensor nodes
A wireless sensor node is described. The wireless sensor node may include a wake-up circuitry configured to awaken the sensor when a request is received. ... Analog Devices Inc
Vertical stopper for capping mems devices
Capped microelectromechanical systems (mems) devices are described. In at least some situations, the mems device includes one or more masses which move. ... Analog Devices Inc
Magnetic isolators for increased voltage operations and related methods
A magnetic isolator is described. The magnetic isolator may comprise a top conductive coil, a bottom conductive coil, and a dielectric layer separating the top conductive coil from the bottom conductive coil. ... Analog Devices Inc
Mode-matching of mems resonators
Systems and techniques are described for matching the resonance frequencies of multiple resonators. In some embodiments, a resonator generates an output signal reflecting the resonator's response to an input drive signal and an input noise signal. ... Analog Devices Inc
Multi-dimensional measurement using magnetic sensors and related systems, methods, and integrated circuits
This disclosure describes, among other things, embodiments of devices, systems, and methods for using 3-dimensional (3d) magnetic sensors to detect the position of a magnetic target. By using 3d magnetic sensors, a two dimensional array of such magnetic sensors can be used to determine a 3d position of a magnetic target.. ... Analog Devices Inc
Low-area, low-power, power-on reset circuit
This application discusses techniques for providing a power-on reset (por) circuit. The techniques take advantage of the small size of active devices, consume very little current and can use a native nmos transistor to provide a stable reference over temperature and voltage variations.. ... Analog Devices Inc
Coupled-line balun with common-mode nulling
Coupled-line baluns with common-mode compensation are provided herein. In certain configurations, a series resistor-inductor (rl) network is connected to ports of a coupled-line balun to null the common-mode transmission coefficient at a desired frequency. ... Analog Devices Inc
Differential current to voltage converter
The present disclosure provides systems and methods to provide a constant common mode voltage at the input terminals of a difference amplifier. A difference amplifier can receive an input signal and can deliver an amplified version of the received input signal at an output of the difference amplifier. ... Analog Devices Inc
Compact integrated device packages
Compact integrated device packages are disclosed. The package comprises a package substrate, a first integrated device die, and a second integrated device die. ... Analog Devices Inc
Precise voltage positioning using dc-dc converter
Techniques to control the start point of an output voltage of a power supply for a short period after receive a “stop switching” signal, which will switch a dc-dc switching regulator from a pulse width modulation (pwm) mode to a linear mode to precisely position the output voltage at a certain level. In this way, the power supply can remove any output ripple caused by the pwm mode and can minimize or remove the sampling error to a low-power system in every cycle. ... Analog Devices Inc
Circuits for on-situ differential impedance balance error measurement and correction
Circuits are used to sense and compensate or mitigate the imbalance errors, hence restoring the intended benefits of differential processing. In particular, the impedance mismatch between the positive and negative branches of a balanced system is sensed by digitizing an error voltage developed by injecting suitable common mode stimuli. ... Analog Devices Inc
Quality of service ordinal modification
In an example, there is disclosed a computing apparatus, having: a first master having a first ordinal quality of service (qos) profile; a second master having a second ordinal qos profile, wherein the second ordinal qos profile is higher in order than the first ordinal qos profile; a slave; a multiplexed interconnect to communicatively couple the first master and second master to the slave with a priority according to the ordinal qos profiles; and one or more logic elements, including at least one hardware logic element, providing a qos engine to: determine that the first master has initiated a slave operation via the interconnect; determine that completing the slave operation according to a qos criterion provided by the second master requires elevated qos; and promote the first master to a third ordinal qos profile having an order higher than the second ordinal qos profile.. . ... Analog Devices Inc
Measuring and correcting non-idealities of a system
Many systems implement calibration schemes to measure and correct for the non-idealities. Such systems can be complex, which makes them impractical to implement since the cost can potentially outweigh the benefits of the calibration scheme. ... Analog Devices Inc
Wide-range precision rf peak detector
An rf peak-detector circuit can operate over a wide range and can compensate or correct an output voltage error term that depends on the thermal voltage and the input signal voltage. At or near a minimum value of the input signal voltage range, such compensation can include a scaled base-emitter ratioing of bipolar junction transistors used to generate the output voltage, each of which can be biased by a primary current. ... Analog Devices Inc
Method and system for synchronizing and interleaving separate sampler groups
Serial data transfer uses ever increasing transmission rates. The data transfer rate of a clock-and-data recovery (cdr) deserializer can be increased by using multiple independent sampler blocks that process serial input data in parallel. ... Analog Devices Inc
Apparatus and methods for rotary traveling wave oscillators
Apparatus and methods for rotary traveling wave oscillators (rtwos) are provided herein. In certain configurations, an rtwo includes a differential transmission line connected in a ring and a plurality of segments distributed around the ring. ... Analog Devices Inc
Apparatus and methods for frequency tuning of rotary traveling wave oscillators
Apparatus and methods for frequency tuning of rotary traveling wave oscillators (rtwos) are provided herein. In certain configurations, distributed quantized tuning is used to tune a frequency of the rtwo. ... Analog Devices Inc
Phase control of clock signal based on feedback
Aspects of this disclosure relate to adjusting a phase of a clock signal provided to a device based on a feedback signal from the device. The feedback signal can provide phase information associated with the device and/or other information associated with the device, such as temperature information. ... Analog Devices Inc
Folded tether structure for mems sensor devices
A microelectromechanical systems (mems) sensor device with a compound folded tether is disclosed. The compound folded tether connects a movable proof mass to a substrate, and includes folds composed of multiple short segments aligned with each other to form a longer composite segment having multiple breaks along its length. ... Analog Devices Inc
Fast settling sawtooth ramp generation in a phase-locked loop
Aspects of this disclosure relate to reducing settling time of a sawtooth ramp signal in a phase-locked loop. Information from a loop filter of the phase-locked loop can be stored and used within the loop filter so as to improve the settling time of the sawtooth ramp signal. ... Analog Devices Inc
Amplifier calibration
An amplifier circuit can include an amplifier and a resistor network coupled to the amplifier. The resistor network can include a range resistor coupled in parallel to a resistor string, and one or more switches coupled to the resistor string. ... Analog Devices Inc
On-chip measurement for phase-locked loop
A chip includes a phase-locked loop (pll) and a test controller. The pll includes an oscillator and a phase detector. ... Analog Devices Inc
Incremental preloading in an analog-to-digital converter
During operation of a sar adc, several of the msbs can be preloaded with predetermined bit decisions prior to carrying out bit trials. A system and method can be provided for incrementally preloading the predetermined bit decisions such as to maintain voltages present at comparator inputs within a limited range of acceptable input voltages.. ... Analog Devices Inc
Parameter correction for cascaded signal components
Various examples are directed to crosspoint switches and methods of use thereof. An example cross point switch comprises a first row buffer, a second row buffer, a first column buffer, and a second column buffer. ... Analog Devices Inc
Adaptive self-configuring sensor node
An adaptive self-configuring sensor node is disclosed herein. The node is associated with one or more sensor, and can include a microcontroller unit (mcu), sensors and a wired/wireless communication module (e.g., transceiver) to communicate the data collected by the sensors. ... Analog Devices Inc
Electrical overstress detection device
The disclosed technology generally relates to electrical overstress protection devices, and more particularly to electrical overstress monitoring devices for detecting electrical overstress events in semiconductor devices. In one aspect, a device configured to monitor electrical overstress (eos) events includes a pair of spaced conductive structures configured to electrically arc in response to an eos event, wherein the spaced conductive structures are formed of a material and have a shape such that arcing causes a detectable change in shape of the spaced conductive structures, and wherein the device is configured such that the change in shape of the spaced conductive structures is detectable to serve as an eos monitor.. ... Analog Devices Inc
Method and apparatus for motor rotor position determination
This application discusses techniques for providing sensorless rotor position information of a multiple phase motor without using predetermined motor parameters or models, other than the number of phases of the motor. In certain examples, motor rotor position information can be provided using samples of current from zero-voltage vectors of the motor windings.. ... Analog Devices Inc
Coupled accordion springs in microelectromechanical systems (mems) devices
Microelectromechanical systems (mems) devices are described that include a proof mass movably connected to a substrate by accordion springs disposed on opposite sides of the proof mass, with a coupler coupling two of the accordion springs together. The coupler is a bar in some implementations, and may be rigid. ... Analog Devices Inc
Method and apparatus to reduce effect of dielectric absorption in sar adc
A successive approximation register analog to digital converter (sar adc) is provided in which impact of dielectric absorption is reduced with a correction circuit configured to adjust a present digital code value signal based at least in part upon a previous digital code value signal, an acquisition time and temperature.. . ... Analog Devices Inc
Protection schemes for mems switch devices
Micro-electromechanical switch (mems) devices can be fabricated using integrated circuit fabrication techniques and materials. Such switch devices can provide cycle life and insertion loss performance suiting for use in a broad range of applications including, for example, automated test equipment (ate), switching for measurement instrumentation (such as a spectrum analyzer, network analyzer, or communication test system), and uses in communication systems, such as for signal processing. ... Analog Devices Inc
Interference handling in time-of-flight depth sensing
Aspects of the embodiments are directed to methods and imaging systems. The imaging systems can be configured to sense, by an light sensor of the imaging system, light received during a time period, process the light received by the light sensor, identify an available measurement period for the imaging system within the time period based on the processed light, and transmit and receive light during a corresponding measurement period in one or more subsequent time periods.. ... Analog Devices Inc
Interference handling in time-of-flight depth sensing
Aspects of the embodiments are directed to methods and imaging systems. The imaging systems can be configured to sense, by an light sensor of the imaging system, light received during a time period, process the light received by the light sensor, identify an available measurement period for the imaging system within the time period based on the processed light, and transmit and receive light during a corresponding measurement period in one or more subsequent time periods.. ... Analog Devices Inc
Equalizer circuit optimization using coarse frequency detection
A system can be configured to control an equalizer circuit to equalize a data signal without requiring prior knowledge of the data signal's data rate. In an example, the system includes an equalizer circuit configured to equalize a data signal based on an equalizer control signal to produce an equalized signal, and a pattern detector configured to detect a specified data pattern in the equalized signal at each of multiple sampling rates. ... Analog Devices Inc
Input buffer
The trend in wireless communication receivers is to capture more and more bandwidth to support higher throughput, and to directly sample the radio frequency (rf) signal to enable re-configurability and lower cost. Other applications like instrumentation also demand the ability to digitize wide bandwidth rf signals. ... Analog Devices Inc
Bootstrapped switching circuit
The trend in wireless communication receivers is to capture more and more bandwidth to support higher throughput, and to directly sample the radio frequency (rf) signal to enable re-configurability and lower cost. Other applications like instrumentation also demand the ability to digitize wide bandwidth rf signals. ... Analog Devices Inc
Apparatus and methods for a difference amplifier
Apparatus and methods for a difference amplifier are provided. In certain examples, the difference amplifier can provide high common mode rejection without differential signal attenuation. ... Analog Devices Inc
Fast settling capacitive gain amplifier circuit
A capacitive gain amplifier circuit amplifies an input signal by a pair of differential amplifier circuits couples in series. The first differential amplifier circuit is reset during an autozero phase while disconnected from the second differential amplifier circuit, and the first and second differential amplifier circuits are connected together in series during a chop phase. ... Analog Devices Inc
Fast settling capacitive gain amplifier circuit
A capacitive gain amplifier circuit includes two sets of miller capacitors and two output stage differential amplifier circuits. A first set of miller capacitors is used to compensate the first output stage differential amplifier circuit during a first phase that resets the first output stage differential amplifier circuit. ... Analog Devices Inc
Heat management in a multi-finger fet
The present disclosure addresses thermal issues in a multi gate finger field-effect transistor (fet) by providing a multi-gate finger fet arrangement where the respective distances between the multiple gate fingers are modulated along the device, such that the distances between the gate fingers in or towards the middle of the device are greater than the distances between the gate fingers at the or towards the edge of the device. By providing the greater distances between gate fingers located in or towards the middle of the device then improved thermal management properties are obtained, and the device as a whole is maintained cooler than would otherwise be the case, with associated improvements in device lifetimes.. ... Analog Devices Inc
Single lead-frame stacked die galvanic isolator
Isolators for providing electrical isolation between two circuits operating at different voltages are described, in which multiple semiconductor dies including the isolator components and the components of the two circuits are stacked on top of each other to provide a laterally-compact arrangement. An isolation barrier electrically separates the two circuits, and the isolator may provide a communication channel for transfer of information and/or power between the two circuits. ... Analog Devices Inc
Soft start method and circuit
A soft start amplifier provides a soft-start function that controls a battery charging current in a feedback loop charging circuit by selecting the lowest voltage between a soft start voltage and an error derived control voltage. The lowest voltage is used as a control signal for controlling the battery charging current in the feedback loop charging circuit. ... Analog Devices Inc
Radio frequency transmitter noise cancellation
Transmitter noise cancellation may be applied on a channel by channel basis to active channels of an incoming radio frequency signal received at a receiver. A noise cancellation filter may be provided for each active channel in a predetermined signal band. ... Analog Devices Inc
Low capacitance switch for programmable gain amplifier or programable gain instrumentation amplifier
A low capacitance n-channel analog switch circuit, a p-channel analog switch circuit, and a full cmos transmission gate (t-gate) circuit are described. Resistive decoupling can be used to isolate the switch or t-gate from ac grounds. ... Analog Devices Inc
Low capacitance analog switch or transmission gate
A low capacitance n-channel analog switch circuit, a p-channel analog switch circuit, and a full cmos transmission gate (t-gate) circuit are described. Resistive decoupling can be used to isolate the switch or t-gate from ac grounds, such as one or more switch control signal inputs or supply voltages. ... Analog Devices Inc
Switchable transformer-based balun
A transformer-based balun circuit s disclosed herein. The balun can be implemented using a spiral transformer, where primary and secondary transformer windings can be inductively coupled and can be implemented on the same metal layer (or different metal layers, e.g. ... Analog Devices Inc
Systems and methods for determining motor parameters
The present disclosure provides a system and method to determine at least one parameter of a motor, such as an inductance. The inductance can be determined, such as based on one or more digitally sampled motor winding currents. ... Analog Devices Inc
Antenna array calibration systems and methods
Aspects of this disclosure relate to an array calibration system and method using probes disposed between antenna elements. In certain embodiments, the calibration is performed by measuring near-field relative phase and amplitude measurements of the antenna elements and using such relative measurements to adjust the amplitude and phase of the transceivers connected to the antenna elements. ... Analog Devices Inc
Compact integrated device packages
An integrated device package sized and shaped to fit in a small space, such as within a body lumen or cavity of a human patient, is disclosed. The integrated device package includes a package substrate and integrated device dies. ... Analog Devices Inc
Methods of manufacture of an inductive component and an inductive component
The disclosure relates to the manufacture of inductive components, in particular transformers, using a combination of microfabrication techniques and discrete component placement. By using a prefabricated core, the core may be made much thicker than one that is deposited using microfabrication techniques. ... Analog Devices Inc
Systems and techniques for remote bus enable
Disclosed herein are systems and techniques for remote bus enable. In some embodiments, a communication system with remote enable functionality may include: a master transceiver coupled to a downstream link of a bus; a voltage regulator, wherein the voltage regulator has a voltage output and an enable input, and the voltage output is coupled to the master transceiver; and a switch coupled to the enable input of the voltage regulator.. ... Analog Devices Inc
Proportional to absolute temperature reference circuit and a voltage reference circuit
The present disclosure relates to a ptat voltage reference circuit and a temperature independent voltage reference circuit in which the effect of transistor base currents on the circuit output is compensated for. This is achieved by a pair of compensation resistors. ... Analog Devices Inc
Electrochemical sensor, and a method of forming an electrochemical sensor
An electrochemical sensor is provided which may be formed using micromachining techniques commonly used in the manufacture of integrated circuits. This is achieved by forming microcapillaries in a silicon substrate and forming an opening in an insulating layer to allow environmental gases to reach through to the top side of the substrate. ... Analog Devices Inc
Quad proof mass mems gyroscope with outer couplers and related methods
A two-axis microelectromechanical systems (mems) gyroscope having four proof masses disposed in respective quadrants of a plane is described. The quad proof mass gyroscope may comprise an inner coupler passing between a first and a third proof mass and between a second and a fourth proof mass, and coupling the four proof masses with one another. ... Analog Devices Inc
Simple code reader
Embodiments of the present disclosure provide code readers for reading codes provided as patterns imprinted on objects. Light interacts with a pattern by e.g. ... Analog Devices Inc
Cavity package with composite substrate
An integrated device package is disclosed. The package can include a package substrate comprising a composite die pad having an upper surface and a lower surface spaced from the upper surface along a vertical direction. ... Analog Devices Inc
Optical emitter packages
An optical emitter package is disclosed. The optical emitter package can include a carrier, a switching die, and an optical emitter die mounted to the carrier. ... Analog Devices Inc
Single-wire sensor bus
A electronics control unit is in contemporaneous wireless power communication and wireless data communication with a network of sealed, sensors over a shared bidirectional power antenna. Sensors and sensor networks described below enable the development of networks that are secure and robust, and yet are lighter-weight and lower-cost than, for example, conventional automotive sensor networks.. ... Analog Devices Inc
Circuits and techniques for noise control in digital imaging
A regulated supply voltage can be established using switching cycles defined at least in part according to a switching clock period. Imaging information can be acquired from an imaging sensor and a discrete-time representation of the imaging information can be received. ... Analog Devices Inc
Galvanically isolated data isolator with improved common mode transient rejection
A transformer based digital isolator is provided that has improved immunity to common mode interference. The improved immunity is provided by placing the transformer in association with an h-bridge drive circuit, and taking additional effort to tailor the on state resistance of the transistors to control a common mode voltage at the transformer.. ... Analog Devices Inc
Suppression of electromagnetic interference in sensor signals
Circuits and techniques are described for reducing the impact of environmental noise and interference on the output signal of a capacitive sensor. The output signal is sampled randomly in some situations by generating a random sampling instant within a fixed clock period. ... Analog Devices Inc
Radio frequency isolator
Radio frequency (rf) isolators are described, coupling circuit domains operating at different voltages. The rf isolator may include a transmitter which emits a directional signal toward a receiver. ... Analog Devices Inc
Anchor tracking apparatus for in-plane accelerometers and related methods
A microelectromechanical systems (mems) accelerometer is described. The mems accelerometer may comprise a proof mass configured to sense accelerations in a direction parallel the plane of the proof mass, and a plurality of compensation structures. ... Analog Devices Inc
Signal analyzer system for monitoring bio-media, analysis of motion-induced signal modulation
According to one configuration, a system includes sensor hardware and signal processor resource to monitor and analyze bio-media (such as blood and/or other matter) of a person under test. During operation, the sensor hardware monitors the bio-media of the person under test and produces an output. ... Analog Devices Inc
Systems and methods of monitoring electrodermal activity (eda) using an ac signal and discrete fourier transform (dft) analysis
Systems and methods of monitoring electrodermal activity (eda) in human subjects suitable for use in wearable electronic devices. An eda monitoring system can include first and second dry electrodes, an alternating current (ac) excitation signal source, a trans-impedance amplifier, an analog-to-digital (a-to-d) converter, a discrete fourier transform (dft) processor, and a microprocessor. ... Analog Devices Inc
Power regulation system for energy harvesters
According to some aspects, a power regulation system for energy harvesters that lacks a battery is provided. In some embodiments, the power regulation system may receive power from multiple energy harvesters that generate energy from different sources, such as wind currents and ambient light. ... Analog Devices Inc
Mems switch
Several features are disclosed that improve the operating performance of mems switches such that they exhibit improved in-service life and better control over switching on and off.. . ... Analog Devices Inc
Data handoff between randomized clock domain to fixed clock domain
A time-interleaved analog-to-digital converter (adc) having m adcs can increase the sampling speed several times compared to the sampling speed of just one adc. Some time-interleaved adcs randomize the order of the m adcs sampling the analog input signal to improve dynamic performance. ... Analog Devices Inc
High voltage clamps with transient activation and activation release control
High voltage clamps with active activation and activation-release control are provided herein. In certain configurations, a clamp can have scalable operating clamping voltage level and can be used to protect the electrical circuit connected to a power supply of a semiconductor chip from damage from an overstress event, such as electrostatic discharge (esd) events. ... Analog Devices Inc
Crash sensor assembly
A sensor assembly specially adapted for use as a crash sensor for motor vehicle applications. The sensor assembly includes a connector housing assembly and a separate sensor element. ... Analog Devices Inc
Common mode rejection in a reservoir capacitor sar converter
An analog-to-digital converter (adc) circuit comprises a first digital-to-analog (dac) circuit and a second dac circuit, wherein the first and second dac circuits include weighted bit capacitors and reservoir capacitors; a sampling circuit configured to sample a differential input voltage onto the weighted bit capacitors and to sample a reference voltage onto the reservoir capacitors; a comparator circuit operatively coupled to outputs of the first and dac circuits; and logic circuitry configured to: initiate successive bit trials of weighted bit capacitors to convert the input voltage to a digital value by comparing an output of the first dac circuit and an output of second dac circuit using the comparator circuit; and apply charge of the reservoir capacitors to the bit capacitors to reduce the comparator differential input voltage and reduce an error between the input common mode offset and the comparator common mode offset.. . ... Analog Devices Inc
Electronic switch exhibiting low off-state leakage current
According to some aspects, a low-leakage switch is provided. In some embodiments, the low-leakage switch includes a plurality of pass transistors in series that selectively couple two ports of the low-leakage switch and a node biasing circuit coupled to a node between the plurality of pass transistors. ... Analog Devices Inc
Dynamic exchange of electrical current control devices in a load current controller
In an example, a circuit for controlling at least two electronic switches in a parallel configuration between a power supply and a load. The circuit includes a control circuit to generate first and second control signals to control first and second electronic switches of the at least two electronic switches, and establish a conduction sequence of the first and second electronic switches using the first and second control signals. ... Analog Devices Inc
Integrated device dies and methods for singulating the same
Integrated device dies and methods for forming one or more of the integrated device dies are disclosed. The integrated device dies can be formed using two step sawing process; a first sawing step partially sawing a substrate comprising metal and a second sawing step sawing through a remaining thickness of the substrate.. ... Analog Devices Inc
On-demand heart rate estimation based on optical measurements
Activity monitors and smart watches utilizing optical measurements are becoming widely popular, and users expect to get an increasingly accurate estimate of their heart rate (hr) from these devices. These devices are equipped with a light source and an optical sensor which enable estimation of hr using a technique called photoplethysmography (ppg). ... Analog Devices Inc
Selective conductive coating for mems sensors
A capacitive microelectromechanical systems (mems) sensor is provided, having conductive coatings on opposing surfaces of capacitive structures. The capacitive structures may be formed of silicon, and the conductive coating is formed of tungsten in some embodiments. ... Analog Devices Inc
Current sensing in two-dimensional area sensors
Aspects of the embodiments are directed an analog front end circuit (afe circuit), the afe circuit including a beamforming circuit configured to receive as an input a plurality of receiver inputs, the receiver inputs coupled to a sensor element. The beamforming circuit can include a plurality of receiver sub-circuits, each sub-circuit including a digital-to-analog converter, a low noise amplifier, and an i/q mixer circuit element; an adder circuit element at an output of the i/q mixer circuit element; and a multiplexer coupled to an output of the adder circuit. ... Analog Devices Inc
Apparatus and methods for actively-controlled trigger and latch release thyristor
Apparatus and methods for actively-controlled trigger and latch release thyristor are provided. In certain configurations, an actively-controlled protection circuit includes an overvoltage sense circuit, a thyristor or silicon controlled rectifier (scr) that is electrically connected between a signal node and a discharge node, and an active trigger and latch release circuit. ... Analog Devices Inc
Apparatus for and method of providing measurements of uncertainty in respect of a transfer function
An apparatus is provided that can estimate a transfer function, for example of current measurement systems, voltage measurement systems and power measurement systems, and also provide an estimate of certainty about the transfer function. This enables customers to have confidence that they are not being overcharged for electricity.. ... Analog Devices Inc
Digital to analog converter including logical assistance
Digital to analog converters (dac) are used to convert digital signals to analog values. The digital system providing data to the analog converter may be highly tasked. ... Analog Devices Inc
Buffer, and digital to analog converter in combination with a buffer
A buffer is provided where a part of the buffer is implemented in switched capacitor or other analog discrete time processing circuitry and a dynamic response characteristic, such as an effective gain or charge transfer coefficient between the input stage and an output stage is digitally controllable. This means that the buffer can be driven as if it was a system controlled by, for example a three (3) term controller, giving rise to greater, digital flexibility in tailoring the buffer's transient response.. ... Analog Devices Inc
Buffer with increased headroom
Provided herein are amplifiers, such as buffers, with increased headroom. An amplifier stage includes a follower transistor and current source configured to receive a power supply voltage comprising an alternating current component and a direct current component. ... Analog Devices Inc
Passive sensor system with carbon nanotube components
A passive wireless sensor system is disclosed that includes components fabricated from carbon nanotube (cnt) structures. In some situations, the passive wireless sensor system includes a cnt structure sensor and an antenna that communicates wirelessly by altering an impedance of the antenna. ... Analog Devices Inc
Current sensor and a method of manufacturing a current sensor
The present disclosure provides an improved rogowski-type current sensor. In order to allow the sensing coil and the compensation wire to overlap, the sensor is produced using two boards. ... Analog Devices Inc
Output voltage hold scheme for ultra low power regulator
Apparatus and methods for providing an ultra-low power voltage converter are provided. In an example, a method can include receiving an ultra-low power command at a voltage regulator circuit from a load, disabling charge transfer of a regulator of the regulator circuit during an ultra-low power mode of operation in response to a first state of the ultra-low power command, detecting a change in the low power command or in a timeout signal, receiving an indication that the output voltage of the regulator is below a low voltage threshold in response to the change, discharging the output voltage of the regulator for a reset interval in response to the indication, and enabling charge transfer of the regulator after discharging the output voltage.. ... Analog Devices Inc
Flex-based surface mount transformer
A transformer can include a flexible substrate having at least a first conductive layer and a dielectric layer. The transformer can further include an unbroken toroidal core of a magnetic material. ... Analog Devices Inc
Fast regulator architecture having transistor helper
Apparatus and methods for assisting a voltage regulator. In an example, a voltage regulator can include an error amplifier configured to compare a reference voltage with a representation of an output voltage of the voltage regulator, an output transistor coupled to a supply voltage and configured to receive an output of the error amplifier and to provide the output voltage, and an auxiliary-current circuit including a helper transistor having a terminal coupled to the output voltage, the helper transistor configured to turn on when the output voltage drops due to current demand from the load and to provide charge current to the load in addition to current provided by the output transistor.. ... Analog Devices Inc
Chip including over-voltage and surge protection
An integrated circuit is provided in which a surge protector, protecting against modest over-voltage events which may contain a lot of energy, and an electrostatic discharge (esd) protector, protecting against high voltage events that may contain only a little energy, are provided within the integrated circuit package. The two types of protectors may protect against different types of electrical events.. ... Analog Devices Inc
Hybrid flash lidar system
Improved flash light detection and ranging (also referred to herein as “flash lidar”) systems and methods for determining the distance to a target object disposed in a field-of-view. A flash lidar system can include an array of illuminators, an array of light detectors, and a signal processor/controller, as well as have a field-of-view in which a target object may be disposed. ... Analog Devices Inc
Mixed-mode digital predistortion
Various examples are directed to systems and methods for digital predistortion (dpd). A linear digital predistortion (dpd) circuit may be programmed to generate a pre-distorted signal linear component based at least in part on a complex baseband signal. ... Analog Devices Inc
Wideband digital predistortion
Various examples are directed to systems and methods for wideband digital predistortion. A digital pre-distortion circuit may be programmed to receive a complex baseband signal and generate a pre-distorted signal. ... Analog Devices Inc
Multiple-level driver circuit with non-commutating bridge
A multiple-level driver circuit, such as for providing several different signals to a device under test (dut) in an automated test system, can include multiple diode bridge circuits. In an example, a first diode bridge circuit is configured to receive a multiple-valued input voltage signal, having at least two different dc voltage signal levels, at an input node and, in response, to selectively provide a corresponding multiple-valued output voltage signal at an output node. ... Analog Devices Inc
Integrated circuit with on chip variation reduction
Many electronic circuits rely on the ratio of one component to other components being well defined. Current flow in component can warm the component causing its electrical properties to change, for example the resistance of a resistor may increase due to self-heating as a result of current flow. ... Analog Devices Inc
Semiconductor package with barrier for radio frequency absorber
Semiconductor packages and methods of manufacturing semiconductor packages are described herein. In certain embodiments, the semiconductor package includes a housing including a first compartment and a second compartment, the first and second compartments being divided from one another. ... Analog Devices Inc
3-axis angular accelerometer
Angular accelerometers are described, as are systems employing such accelerometers. The angular accelerometers may include a proof mass and rotational acceleration detection beams directed toward the center of the proof mass. ... Analog Devices Inc
Capacitive gesture detection system and methods thereof
Apparatus and methods are disclosed related to managing characteristics of a mobile device based upon capacitive detection of materials proximate the mobile device, a capacitive gesture system that can allow the same gestures be used in arbitrary locations within range of a mobile device. One such method includes receiving a first capacitive sensor measurement with a first capacitive sensor of the mobile device. ... Analog Devices Inc
Built in self-test
A method for testing a dac comprising controlling the dac digitally to cause it to produce a known desired analogue output, for example a fixed amplitude sine wave; determining the duration of fixed voltage segments of the actual output of the dac and using the duration of the fixed voltage segments to assess or determine performance of the dac.. . ... Analog Devices Inc
Apparatus and methods for phase synchronization of phase-locked loops
Apparatus and methods for phase synchronization of phase-locked loops (plls) are provided. In certain configurations, an rf communication system includes a pll that generates one or more output clock signals and a phase synchronization circuit that synchronizes a phase of the pll. ... Analog Devices Inc
Physical isolation between mac and phy ethernet connections
An apparatus is provided comprising: a first power domain that includes a first component that operates at a first voltage level; a second power domain that includes a media access controller (mac) that operates at a second voltage level; and a third power domain that includes a physical media access (phy) device that operates at a third voltage level; wherein the first voltage level is higher than the second voltage level; and wherein the second voltage level is unreferenced; further including: a first reinforced electrical isolation circuit disposed on a first circuit path that includes at least one signal lane that extends between the first power domain and the second power domain; and a second reinforced electrical isolation circuit disposed on a second circuit path that includes at least one signal lane that extends between the mac device and the phy device.. . ... Analog Devices Inc
Bus driver / line driver
A bus driver is provided that can withstand over voltages being applied to its output terminal without the protection circuit detracting from the voltage swing that can be provided by the driver. The circuit arrangement also allows transistors having good on state resistance and large tolerance of drain-to-source voltages to be used.. ... Analog Devices Inc
Low stress integrated device packages
An integrated device package is disclosed. The integrated device package can include a packaging structure defining a cavity. ... Analog Devices Inc
Coordination/control of multiple medical devices at a site
According to one configuration, a controller controls use of multiple medical devices at a medical site. For example, a first medical device at the medical site is operable to perform one or more tissue ablation operations; a second medical device at the medical site is operable to perform non-ablation operations (such as tissue monitoring operations). ... Analog Devices Inc
Portless and membrane-free microphone
Sound waves cause pressure changes in the air, and the pressure changes cause changes in the dielectric constant of air. Capacitive sensor measurements indicative of the changes in the dielectric constant of air can be processed to extract features associated with sound waves in the air. ... Analog Devices Inc
Apparatus and methods for wideband receivers
Provided herein are apparatus and methods for wideband receivers. In certain configurations, a radio frequency (rf) communication system includes two or more receiver slices that operate in parallel with one another to process an rf input signal. ... Analog Devices Inc
Detecting a presence of a target in a room
Apparatus for detecting a presence of a target in a room is disclosed. The apparatus includes a motion-sensitive passive infrared (pir) sensor, an imaging sensor, and a control unit. ... Analog Devices Inc
Microphone arrays and communication systems for directional reception
Disclosed herein are microphone arrays for directional reception, along with related system, devices, and techniques. For example, a four-microphone array for directional signal reception may include first, second, and third microphones arranged such that projections of the first, second, and third microphones in a plane provide corners of a triangle in the plane. ... Analog Devices Inc
Network connectivity for constrained wireless sensor nodes
Wireless sensor nodes for enabling network connectivity in a wireless sensor network system are disclosed herein. An exemplary method includes receiving a lightweight machine-to-machine (lwm2m) network packet from a network node over a network; using a media access control (mac) layer to route the lwm2m network packet to a sensor node when a destination internet protocol (ip) address specified in the lwm2m network packet matches a virtual ip address; and using a network layer to route the lwm2m network packet to the sensor node when the destination ip address does not match a virtual ip address.. ... Analog Devices Inc
Flexible energy harvesting antenna
Flexible antennas for harvesting electromagnetic energy are described. The flexible antenna may be a far field antenna and may comprise a flexible substrate, a first metal layer disposed on one side of the flexible substrate, and a second metal layer disposed on an opposite side of the flexible substrate. ... Analog Devices Inc
Tank circuit and frequency hopping for isolators
Embodiments of the present disclosure may provide a circuit comprising a tank circuit. The tank circuit may include an inductor having a pair of terminals, a first pair of transistors, and a first pair of capacitors. ... Analog Devices Inc
Simple code reader
Embodiments of the present disclosure provide code readers for reading codes provided as patterns imprinted on objects. Light interacts with a pattern by e.g. ... Analog Devices Inc
Wireless keyless entry systems and methods
Wireless keyless entry systems for automotive vehicles that employ activity, fitness, biometric, and/or proximity data for identifying authorized system users and/or personalizing, tailoring, or controlling operational aspects of the automotive vehicles. The wireless keyless entry systems are configured to be worn by system users as wearable key fobs, allowing the wireless keyless entry systems to detect motions of the system users, monitor biometric data from the system users, as well as determine proximities of the system users relative to the respective automotive vehicles. ... Analog Devices Inc
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