Patents Assigned to Analog Devices, Inc.
  • Patent number: 11031941
    Abstract: There is disclosed in one example a digital phase-locked loop (DPLL) circuit adapted to avoid loop-bandwidth tradeoff, the circuit including: a frequency dimension frequency detector having an external frequency input and a feedback frequency input, the frequency dimension frequency detector including circuitry to measure a frequency difference between the external frequency input and the feedback frequency input and to drive an impulse signal, wherein the impulse signal is of a first species if the difference is positive and of a second species if the difference is negative; and a number-controlled oscillator (NCO) including circuitry to drive an output clock and to adjust the frequency of the output clock responsive to the impulse signal, wherein an output of the NCO provides the feedback frequency input of the frequency dimension frequency detector.
    Type: Grant
    Filed: May 8, 2020
    Date of Patent: June 8, 2021
    Assignee: ANALOG DEVICES, INC.
    Inventor: Adam R. Spirer
  • Publication number: 20210165037
    Abstract: Gain independent reference channel measurement system and method. A method of making robust, stable measurements, in a variety of different applications is disclosed. More specifically, this disclosure describes systems and methods relating to performing gain independent reference channel measurements by making two phase measurements of a device under test. Mathematically, the measurements are combined and many common mode parameters drop out. The result yields an analysis of a device under test analysis which mitigated errors, predominately arising from environmental variations and changes in circuit behavior stemming from swings in signal input.
    Type: Application
    Filed: February 12, 2021
    Publication date: June 3, 2021
    Applicant: Analog Devices, Inc.
    Inventor: Shrenik DELIWALA
  • Publication number: 20210161476
    Abstract: 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: Application
    Filed: December 2, 2019
    Publication date: June 3, 2021
    Applicant: Analog Devices, Inc.
    Inventors: Tony J. AKL, Venugopal GOPINATHAN
  • Patent number: 11022629
    Abstract: Techniques are provided for changing a range of an output circuit with little or no voltage or current glitch. In an example, a method of changing a range of an output signal can include providing a first level of the output signal at an output of a first amplifier based on a received setpoint signal and receiving a range change command. In response to the range change command an input of a second amplifier can be shorted to an output of the second amplifier for a first interval. At the end of the first interval and over a second interval, a first impedance between the input of the second amplifier and the output of the second amplifier can be increased, and a second impedance between the input of the second amplifier and the setpoint signal can be increased.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: June 1, 2021
    Assignee: Analog Devices, Inc.
    Inventors: Stefano I. D'Aquino, Jennifer W. Pierdomenico, Edward L. Collins
  • Patent number: 11025264
    Abstract: An ultra-wideband distributed ADC can be cascaded to build high performance radio frequency (RF) analog electronics integrated with advanced digital complementary metal-oxide-semiconductor (CMOS) electronics on the same wafer. Advantages can include wide spectral coverage, high resolution, large dynamic range, and high information processing bandwidth. Part of an overall system includes a precise, programmable, real-time delay circuit that can achieve picosecond accuracy.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: June 1, 2021
    Assignee: Analog Devices, Inc.
    Inventors: Ed Balboni, Frank Murden, Peter Delos
  • Publication number: 20210157766
    Abstract: Disclosed herein are systems and techniques for serial peripheral interface (SPI) functionality for node transceivers in a two-wire communication bus. For example, in some embodiments, a node transceiver may include SPI circuitry and upstream or downstream transceiver circuitry. SPI commands received via the SPI circuitry may be executed by the node transceiver, or transmitted upstream or downstream along the two-wire bus for execution by another node transceiver or a slave device coupled to another node transceiver.
    Type: Application
    Filed: December 2, 2020
    Publication date: May 27, 2021
    Applicant: Analog Devices, Inc.
    Inventors: Martin KESSLER, Lewis F. LAHR, William HOOPER
  • Patent number: 11019441
    Abstract: A position sensor may include a resonator attachable to a first object, and an antenna attachable to a second object and driven at a resonant frequency of the resonator. A change in a position of the first object relative to the second object may be sensed as a change in a power of the antenna when the antenna is driven at the resonant frequency of the resonator. The first object may be a former of a speaker, and a voice coil of the speaker may be positioned on the former together with the position sensor. In operation, the antenna may output a position signal to an external system of electronics, indicating a position of the voice coil. The external system of electronics may perform feedback processing to compensate for nonlinearities in the voice coil's position when the voice coil is used to drive a diaphragm of the speaker.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: May 25, 2021
    Assignee: Analog Devices, Inc.
    Inventor: Kenneth Edward Malsky
  • Publication number: 20210152939
    Abstract: Embodiments may relate to an audio system for playback of an audio signal, for example in a motor vehicle. The audio system may include a virtualization speaker located in a position that would be in front of a listener of the audio system. The audio system may further include a user speaker located in a position that would be behind a listener of the audio system. In some embodiments the virtualization speaker may be configured to play a virtualization audio signal while the user speakers are configured to play an audio signal which at least partially overlaps the virtualization audio signal. In some embodiments the virtualization audio signal may be at a different volume or a different frequency range than the audio signal. Other embodiments may be described or claimed.
    Type: Application
    Filed: November 19, 2019
    Publication date: May 20, 2021
    Applicant: Analog Devices, Inc.
    Inventors: Boris LERNER, Robert ADAMS, Christopher HANNA, Kenneth MALSKY, Philip Gregory GEERLING, Alan Peter NORTON, Andre VAN SCHYNDEL
  • Patent number: 11012104
    Abstract: 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. The transmitter is calibrated to compensate for common mode local oscillator leakage. Thus, a common mode component of the local oscillator signal is reduced or eliminated from the radio frequency transmit signal, which provides a number of benefits, including lower levels of undesired emissions from the transmitter.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: May 18, 2021
    Assignee: Analog Devices, Inc.
    Inventors: David J. McLaurin, Christopher Mayer, Hatice Dicle Ozis Unsal, Zheng Gao
  • Patent number: 11012201
    Abstract: A transmission module is provided that includes a transmitter, a loopback receiver, and a QEC controller. The QEC controller identifies quadrature imbalance in the transmitter based at least one a comparison of the data signals at the output of the loopback receiver with data signals at the input of the transmitter. Based on the comparison, the QEC controller can adjust one or more characteristics of the transmitter to correct quadrature errors in the transmitter.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: May 18, 2021
    Assignee: Analog Devices, Inc.
    Inventors: Raju Hormis, Steven R. Bal, Antonio Montalvo, David J. McLaurin, Martin McCormick
  • Patent number: 11004849
    Abstract: Electrical overstress protection for high speed applications, such as integrated multiple subsystem communications, is provided. In certain embodiments, a semiconductor die with distributed and configurable electrical overstress protection is provided. The semiconductor die includes signal pads, a core circuit electrically connected to the signal pads, and a configurable overstress protection array operable to protect the core circuit from electrical overstress at the signal pads. The configurable overstress protection array includes a plurality of segmented overstress protection devices of two or more different device types, and both a number of selected overstress protection devices and a device type of the selected overstress protection devices is programmable. The subsystems configurations are enabled in FinFET technology.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: May 11, 2021
    Assignee: Analog Devices, Inc.
    Inventors: Javier A. Salcedo, Andrew Lewine
  • Patent number: 10998863
    Abstract: Techniques for monitoring a distortion signal of a power amplifier circuit, where the output of a distortion monitoring circuit includes little or no fundamental signal and closely represents the actual distortion of the amplifier circuit of a wired communications system. The power amplifier circuit can generate a distortion feedback signal that does not affect the power amplifier's output power capability, e.g., no inherent loss in the fundamental output of the amplifier. That is, using a distortion monitor circuit, the power amplifier circuit can resolve a distortion feedback signal from the intended output signal of the output power amplifier circuit.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: May 4, 2021
    Assignee: Analog Devices, Inc.
    Inventor: Christopher John Day
  • Patent number: 10999082
    Abstract: According to various aspects of the present application, systems and methods are provided for implementing a garbled circuit on a device. Doing so allows the device to perform computations while protecting the computations from being observed or accessed by an adversarial entity. A garbled circuit involves two parties, known as the generator and the evaluator, jointly evaluating a function. Conventionally, a garbled circuit is executed on two different devices in order for the two different parties to jointly calculate the function without each party revealing to the other party private information such as input values to the function. Some embodiments provide for execution of the garbled circuit on a single device by implementing both parties on the device as separate processes. Some embodiments prevent an adversarial entity with physical access to the device from being able to observe calculations performed by the device to evaluate a function.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: May 4, 2021
    Assignee: Analog Devices, Inc.
    Inventor: John Ross Wallrabenstein
  • Publication number: 20210123902
    Abstract: 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: Application
    Filed: May 4, 2018
    Publication date: April 29, 2021
    Applicant: Analog Devices, Inc.
    Inventors: Thomas G. O'DWYER, Gaurav VOHRA, Xin ZHANG, YounJae KOOK, Isaac Chase NOVET, Venugopal GOPINATHAN
  • Publication number: 20210119590
    Abstract: 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: Application
    Filed: October 18, 2019
    Publication date: April 22, 2021
    Applicant: Analog Devices, Inc.
    Inventor: Xiao Hong Du
  • Publication number: 20210113842
    Abstract: System and apparatus for pace detection and implementation thereof. A device for detecting pace pulse in the presence of ECG waveforms is disclosed. Specifically, the present disclosure relates to an elegant, novel circuit and method for presenting pace pulse data with or without ECG signals measuring for use in useful in a variety of medical applications. This allows for robust, portable, low-power, higher S/N devices which have historically required a much bigger footprint and complexity.
    Type: Application
    Filed: August 7, 2020
    Publication date: April 22, 2021
    Applicant: Analog Devices, Inc.
    Inventor: Shrenik DELIWALA
  • Patent number: 10985698
    Abstract: Differential electro-mechanical oscillating circuits are described. These circuits may be used in a variety of contexts to produce differential oscillating signals, such as sine waves or square waves. A switched capacitor circuit (SCC) is used to prevent low-frequency locking, whereby the output of the resonator would otherwise lock to a constant value. More specifically, the SCC provides an impedance in parallel to the resonator between the output terminals of oscillating circuit. The SCC is designed so that, at low frequencies, its impedance is lower than the impedance of the resonator. The presence of such an impedance prevents the formation of an open circuit between the output terminals, thus maintaining the oscillating circuit in the oscillation mode. The differential electro-mechanical oscillating circuits described herein may be used to produce clock signals or otherwise to produce periodic reference signals.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: April 20, 2021
    Assignee: Analog Devices, Inc.
    Inventor: Jiefeng Yan
  • Patent number: 10986447
    Abstract: There is disclosed in one example an audio processor, including: an audio crossover to separate a first frequency band from a second frequency band, the first frequency band having a lower frequency band than the second frequency band; an excursion estimator to estimate from information of the first frequency band a predicted excursion of a low-frequency driver; an interpolator to interpolate an adjustment to the second frequency band to compensate for the estimated excursion; and circuitry to drive the adjusted second frequency to a receiver.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: April 20, 2021
    Assignee: ANALOG DEVICES, INC.
    Inventors: Kenneth Malsky, Young Han Kim, Miguel A. Chavez
  • Patent number: D918756
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: May 11, 2021
    Assignee: ANALOG DEVICES, INC.
    Inventors: Jiawen Bai, Ryan Frazier, Ying Zhao, Shrenik Deliwala
  • Patent number: D920825
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: June 1, 2021
    Assignee: ANALOG DEVICES, INC.
    Inventors: Jiawen Bai, Ryan Frazier, Ying Zhao, Shrenik Deliwala