Patents Assigned to Analog Devices
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Patent number: 11545811Abstract: Laser driver designs that aim to reduce or eliminate the problem of fault laser firing are disclosed. Various laser driver designs presented herein are based on providing a current dissipation path that is configured to start providing a resistance for dissipating at least a portion, but preferably substantially all, of the negative current from the laser diode. Dissipating at least a portion of the negative current may decrease the unintentional increase of the voltage at the input to the laser diode and, therefore, reduce the likelihood that fault laser firing will occur. A control logic may be used to control the timing of when the current dissipation path is activated (i.e., provides the resistance to dissipate the negative current from the laser diode) and when it is deactivated.Type: GrantFiled: October 2, 2019Date of Patent: January 3, 2023Assignee: ANALOG DEVICES INTERNATIONAL UNLIMITED COMPANYInventors: Celal Avci, Yalcin Alper Eken, Ercan Kaymaksut, Shawn S. Kuo, Atilim Ergul, Mehmet Arda Akkaya
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Patent number: 11543292Abstract: Low-frequency Noise Cancellation Method for Optical Measurement Systems. The present disclosure provides a low frequency noise cancellation method for optical measurement system, An optical measurement system has a transmitter to drive an LED and a receiver connected to a photodiode. The LED driver will generate a pulse signal to drive the LED and act as the radiation source for the optical measurement. Consequently, the receiver will convert the received photo-diode current to a voltage signal. The signal will then be digitized by an ADC for further processing. A current DAC circuit IDAC is added at the front of the receiver and has the same timing control with the LED driver to cancel the DC portion of the received current.Type: GrantFiled: August 26, 2021Date of Patent: January 3, 2023Assignee: Analog Devices International Unlimited CompanyInventors: Jinhua Ni, Hui Shen
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Patent number: 11543402Abstract: An impedance measurement system for detecting an analyte in a sample is disclosed. The system includes first, second, and third electrodes, wherein at least a portion of the third electrode is positioned between the first and second electrodes, means for generating an electromagnetic field between the first and second electrodes, means for electrically controlling the third electrode, wherein the third electrode modifies the electromagnetic field, and a processor for detecting a presence of the analyte in the sample, based at least in part on a property of the electromagnetic field.Type: GrantFiled: May 4, 2018Date of Patent: January 3, 2023Assignee: Analog Devices, Inc.Inventors: Thomas G. O'Dwyer, Gaurav Vohra, Xin Zhang, YounJae Kook, Isaac Chase Novet, Venugopal Gopinathan
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Patent number: 11545971Abstract: The present disclosure provides techniques for predicting failure of power switches and taking action based on the predictions. In an example, a method can include controlling the at least two parallel-connected power switches via a first driver and a second driver, the first a second driver responsive to a single command signal, measuring a failure characteristic of a first power switch, and disabling a first driver of the first power switch when the first failure characteristic exceeds a failure precursor threshold.Type: GrantFiled: December 17, 2019Date of Patent: January 3, 2023Assignee: Analog Devices International Unlimited CompanyInventor: Bernhard Strzalkowski
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Patent number: 11545996Abstract: Systems, devices, and methods related to low-noise, high-accuracy single-ended continuous-time sigma-delta (CTSD) analog-to-digital converter (ADC) are provided. An example single-ended CTSD ADC includes a pair of input nodes to receive a single-ended input signal and input circuitry. The input circuitry includes a pair of switches, each coupled to one of the pair of input nodes; and an amplifier to provide a common mode signal at a pair of first nodes, each before one of the pair of switches. The single-ended CTSD ADC further includes digital-to-analog converter (DAC) circuitry; and integrator circuitry coupled to the input circuitry and the DAC circuitry via a pair of second nodes.Type: GrantFiled: August 24, 2021Date of Patent: January 3, 2023Assignee: Analog Devices International Unlimited CompanyInventors: Roberto Sergio Matteo Maurino, Venkata Aruna Srikanth Nittala, Bhargav R. Vyas, Christopher Peter Hurrell, Andrew J. Thomas
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Patent number: 11545991Abstract: Disclosed herein are some examples of analog-to-digital converters (ADCs) that can perform auto-zeroing with amplifying a signal for improvement of a signal-to-noise ratio. The ADCs may produce a first digital code to represent an analog input signal and a second digital code based on a residue from the first digital code, and may combine the first digital code and the second digital code to produce a digital output code to represent the analog input signal. The ADC may utilize a first observation and a second observation of an analog residue value representing the residue to produce the second digital code.Type: GrantFiled: November 11, 2021Date of Patent: January 3, 2023Assignee: Analog Devices, Inc.Inventors: Jesper Steensgaard-Madsen, Andrew J. Thomas
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Patent number: 11545886Abstract: Pulse width modulation (PWM) controllers for hybrid converters are provided herein. In certain embodiments, a PWM controller for a hybrid converter includes a threshold generation circuit for generating a threshold signal based on an output voltage of the hybrid converter, a threshold adjustment circuit for generating an adjusted threshold signal based on sensing a voltage of a flying capacitor of the hybrid converter, and a comparator that generates a comparison signal based on comparing the adjusted threshold signal to an indication of an inductor current of the hybrid converter. The output of the comparator is used for generating PWM control signals used for turning on and off the switches (for instance, power transistors) of the hybrid converter.Type: GrantFiled: January 19, 2021Date of Patent: January 3, 2023Assignee: Analog Devices, Inc.Inventors: Yingyi Yan, San Hwa Chee
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Publication number: 20220414181Abstract: A source stochastic signal is deconstructed into its intrinsic components using a decomposition process. The intrinsic components are transformed, and a set of machine learning models are defined and trained to operate with individual ones of the transformed components. The source stochastic signal is thus empirically broken down into underlying components which are then used as learning datasets for the set of machine learning models to predict target components. The target components are then individually predicted and combined to reconstruct a predicted target stochastic signal. The source stochastic signal and the target stochastic signals can be biological signals having a related or common origin, such as photoplethysmogram signals and arterial blood pressure waveforms.Type: ApplicationFiled: November 17, 2021Publication date: December 29, 2022Applicant: Analog Devices International Unlimited CompanyInventors: Eoin Seamus Bolger, Supriya Balaji Ramachandran
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Patent number: 11539353Abstract: Rotary traveling wave oscillator-based (RTWO-based) frequency multipliers are provided herein. In certain embodiments, an RTWO-based frequency multiplier includes an RTWO that generates a plurality of clock signal phases of a first frequency, and an edge combiner that processes the clock signal phases to generate an output clock signal having a second frequency that is a multiple of the first frequency. The edge combiner can be implemented as a logic-based combining circuit that combines the clock signal phases from the RTWO. For example, the edge combiner can include parallel stacks of transistors operating on different clock signal phases, with the stacks selectively activating based on timing of the clock signal phases to generate the output clock signal of multiplied frequency.Type: GrantFiled: July 22, 2021Date of Patent: December 27, 2022Assignee: Analog Devices International Unlimited CompanyInventors: Mohamed A. Shehata, James Breslin, Michael F. Keaveney, Hyman Shanan
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Patent number: 11538709Abstract: A transfer printing method is described that can be used for a wide variety of materials, such as to allow for circuits formed of different materials to be integrated together on a single integrated circuit. A tether (18) is formed on dice regions (16) of a first wafer (30), followed by attachment of a second wafer (32) to the tethers. The dice regions (16) are processed so as to be separated, followed by transfer printing of the dice regions to a third wafer (34).Type: GrantFiled: February 17, 2018Date of Patent: December 27, 2022Assignee: Analog Devices International Unlimited CompanyInventors: James G. Fiorenza, Susan L. Feindt, Michael D. Delaus, Matthew Duffy, Ryan Iutzi, Kenneth Flanders, Rama Krishna Kotlanka
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Patent number: 11539373Abstract: Herein disclosed are some examples of metastability detectors and compensator circuitry for successive-approximation-register (SAR) analog-to-digital converters (ADCs) within delta sigma modulator (DSM) loops. A metastability detector may detect metastability at an output of a SAR ADC and compensator circuitry may implement a compensation scheme to compensate for the metastability. The identification of the metastability and/or compensation for the metastability can avoid detrimental effects and/or errors to the DSM loops that may be caused by the metastability of the SAR ADCS.Type: GrantFiled: June 4, 2021Date of Patent: December 27, 2022Assignee: Analog Devices, Inc.Inventor: Abhishek Bandyopadhyay
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Patent number: 11539561Abstract: Apparatuses and methods related to digital mobile radio (DMR) with enhanced transceiver are disclosed herein. The transceiver detects waveforms of signals received by a digital mobile station radio (MS). By detecting whether the waveforms of the signals, the transceiver allows a digital baseband processor of the MS to remain in a sleep state while the signals are being detected by the DMR, thereby reducing an amount of power used while the signals are being detected.Type: GrantFiled: January 25, 2021Date of Patent: December 27, 2022Assignee: Analog Devices International Unlimited CompanyInventors: Jian Wang, Yong Wang, Haijiao Fan, Reza Alavi, Abdelaziz Chihoub, Esha John, Saeed Aghtar
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Patent number: 11539384Abstract: A transmitter with a DC detection circuit that can control when a modulator of the transmitter is active. When data is being transmitted, a tone introduced by a mixer in the transmit path is hidden by the data signal and has minimal effect on the transmit path. However, when there is no data, the tone can cause undesirable noise. A modulator may move the tone or noise outside of the transmitter's bandwidth. As the data can hide the tone, the DSM may only be needed when there is a DC signal. By activating the DSM only when a DC signal is detected, the extra power introduced by the modulator can be reduced while eliminating in-band noise.Type: GrantFiled: July 22, 2021Date of Patent: December 27, 2022Assignee: Analog Devices, Inc.Inventors: Robert D. Solanki, Christopher Mayer
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Patent number: 11536680Abstract: Electrochemical sensors include a housing within which an electrolyte is provided over the electrodes. The housing includes an active region, which is the area around the electrodes in which the electrolyte must be positioned to ensure correct operation of the device. The inner walls, base and ceiling of the housing are coated in either hydrophobic or hydrophilic materials, or both, so as to encourage the electrolyte to take a position over the active region, which is defined by the position of the electrodes. In some electrochemical sensors, a combination of hydrophobic and hydrophilic materials is used and the materials can be arranged in a pattern, which encourages the electrolyte to take a position over the active region.Type: GrantFiled: November 14, 2019Date of Patent: December 27, 2022Assignee: Analog Devices International Unlimited CompanyInventors: Alfonso Berduque, Youri Victorovitch Ponomarev, Brendan Cawley, Donal McAuliffe, Raymond J. Speer
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Patent number: 11531095Abstract: Techniques are described to for improving a resolution of a light detection and ranging (LIDAR) system. A receiver circuit of a LIDAR system can sample a reflection signal from an object in response to a transmitted light pulse. A controller can determine a curve fit to the received samples and, based on a peak value of the curve fit, determine a precise location of the object.Type: GrantFiled: April 3, 2019Date of Patent: December 20, 2022Assignee: Analog Devices, Inc.Inventor: Harvey Weinberg
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Patent number: 11533027Abstract: Data isolators are described. The data isolators include a differential receiver having cross-coupled single-ended amplifiers. The single-ended amplifiers may be referenced to a time-varying reference potential. The cross-coupling of the single-ended amplifiers may provide high speed, low power consumption operation of the data isolator.Type: GrantFiled: October 18, 2019Date of Patent: December 20, 2022Assignee: Analog Devices, Inc.Inventor: Xiao Hong Du
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Patent number: 11532934Abstract: Digital isolator devices, and many other devices, have a maximum device junction temperature, which, if exceeded, may cause device failure and the integrity of the isolation is no longer guaranteed. The use of an electronic fuse, eFuse, arranged in series with the digital isolator, provides a protection scheme for the digital isolator in which current is limited by the eFuse when it is determined that the supply current of the digital isolator exceeds a predetermined threshold that would the cause junction temperature to increase above an absolute maximum rating. As such, the integrity of the digital isolator is preserved in the event of a system fault.Type: GrantFiled: November 29, 2018Date of Patent: December 20, 2022Assignee: Analog Devices International Unlimited CompanyInventors: Paul O'Sullivan, Maurice O'Brien, Donal G. O'Sullivan, Stefan Hacker, Conal Watterson
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Patent number: 11533070Abstract: Some embodiments herein describe a radio frequency power semiconductor device that include a first non-linear filter network for compensating for lower frequency noise of a power amplifier. The first non-linear filter network can include a plurality of infinite impulse response filters and corresponding corrective elements to correct for a non-linear portion of the power amplifier. The radio frequency power semiconductor device can further include a second non-linear filter network for compensating for broadband distortion. The second non-linear filter network can be connected in parallel to the first non-linear filter network. The broadband distortion can include digital predistortion and the narrowband distortion can include charge trapping effects. The first non-linear filter network can comprise Laguerre filters. The second non-linear filter network can comprise general memory polynomial filters.Type: GrantFiled: November 16, 2020Date of Patent: December 20, 2022Assignee: Analog Devices International Unlimited CompanyInventors: Patrick Joseph Pratt, Dong Chen, Mark Cope, Christopher Mayer, Praveen Chandrasekaran, Stephen Summerfield
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Patent number: 11529102Abstract: There is disclosed herein examples of systems and methods of processing captured heart sounds with frequency-dependent normalization. Based on an amount of attenuation of a first heart sound, a second heart sound can be normalized by modifying portions of the second heart sound by amounts determined based on frequencies of the portions. Accordingly, the systems and methods disclosed herein can result in different amounts of modification of different portions of the second heart sound based on the different frequencies of the portions.Type: GrantFiled: December 2, 2019Date of Patent: December 20, 2022Assignee: Analog Devices, Inc.Inventors: Tony J. Akl, Venugopal Gopinathan
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Publication number: 20220395227Abstract: An alignment tool helps a patient position a chest-worn sensor device, such as a device for daily at-home monitoring of cardiopulmonary health conditions. The alignment tool includes a sensor connector that engages with the sensor device and a strap. The strap includes a first portion that has a protruding region sized to fit into the patient's suprasternal notch. The strap includes a second portion that engages with the sensor connector. The sensor connector and the first portion of the strap with the suprasternal notch protrusion are separated by a configurable length. A healthcare provider may set the length based on the distance between the patient's suprasternal notch and heart.Type: ApplicationFiled: June 10, 2021Publication date: December 15, 2022Applicant: Analog Devices, Inc.Inventors: David BOLOGNIA, Jiawen BAI
