Patents by Inventor Siddharth Maru

Siddharth Maru has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240168506
    Abstract: The present disclosure relates to circuitry for driving a load. The circuitry comprises: primary driver circuitry coupled to a primary signal path and operable to drive the load with a playback signal in a first mode of operation of the circuitry, wherein a playback signal comprises a signal that drives the load to generate a desired output; auxiliary driver circuitry coupled to an auxiliary signal path; an auxiliary current sense resistor in the auxiliary signal path; and current detection circuitry coupled to the auxiliary current sense resistor and configured to generate a signal indicative of a current through the load. One of the primary driver circuitry and the auxiliary driver circuitry is operable to drive the load with a pilot signal in a second mode of operation of the circuitry, wherein a pilot signal comprises a signal having a predefined frequency or frequency content and a predefined magnitude.
    Type: Application
    Filed: March 14, 2022
    Publication date: May 23, 2024
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Tejasvi DAS, Siddharth MARU, Cory J. PETERSON, John L. MELANSON
  • Patent number: 11979115
    Abstract: An amplifier system may include a first feedback loop coupled between an output of an amplifier to an input of a modulator for regulating an output voltage driven at the output of the amplifier to a first terminal of a load of the amplifier system, a sense resistor for sensing a physical quantity associated with the amplifier, a second control loop coupled to the sense resistor such that the sense resistor is outside of the second control loop, the second control loop configured to regulate a common-mode voltage at a second terminal of the load, and a common-mode feedforward circuit coupled to the sense resistor and configured to minimize effects of a signal-dependent common-mode feedback of the sense resistor.
    Type: Grant
    Filed: May 9, 2022
    Date of Patent: May 7, 2024
    Assignee: Cirrus Logic Inc.
    Inventors: Siddharth Maru, Chandra B. Prakash, Tejasvi Das
  • Patent number: 11972105
    Abstract: A force sensing system for determining if a user input has occurred, the system comprising: an input channel, to receive an input from at least one force sensor; an activity detection stage, to monitor an activity level of the input from the at least one force sensor and, responsive to an activity level which may be indicative of a user input being reached, to generate an indication that an activity has occurred at the force sensor; and an event detection stage to receive said indication, and to determine if a user input has occurred based on the received input from the at least one force sensor.
    Type: Grant
    Filed: October 7, 2022
    Date of Patent: April 30, 2024
    Assignee: Cirrus Logic Inc.
    Inventors: Hamid Sepehr, Pablo Peso Parada, Willem Zwart, Tom Birchall, Michael Allen Kost, Tejasvi Das, Siddharth Maru, Matthew Beardsworth, Bruce E. Duewer
  • Patent number: 11948739
    Abstract: A system may include an electromagnetic actuator, a first coil configured to drive mechanical displacement of the electromagnetic actuator, a second coil configured to drive mechanical displacement of the electromagnetic actuator, and an inductance sensing subsystem having an inductance sensing path coupled to the first coil and the second coil.
    Type: Grant
    Filed: January 4, 2022
    Date of Patent: April 2, 2024
    Assignee: Cirrus Logic Inc.
    Inventors: Emmanuel A. Marchais, Tejasvi Das, Siddharth Maru
  • Patent number: 11947756
    Abstract: A correction unit for use in a sensor system, the sensor system comprising a force sensor configured to output a sensor signal indicative of a temporary mechanical distortion of a material under an applied force, the correction unit configured, based on the sensor signal, to: estimate an effect of the applied force on how the material will return towards an undistorted form upon a substantial reduction or removal of the applied force; and generate a corrected signal based on the estimation.
    Type: Grant
    Filed: October 18, 2022
    Date of Patent: April 2, 2024
    Assignee: Cirrus Logic Inc.
    Inventors: Josh Sanz-Robinson, Siddharth Maru, Tejasvi Das
  • Publication number: 20240060920
    Abstract: A system may include a resonant sensor configured to sense a physical quantity, a measurement circuit communicatively coupled to the resonant sensor and configured to measure one or more resonance parameters associated with the resonant sensor and indicative of the physical quantity using an incident/quadrature detector having an incident channel and a quadrature channel and perform a calibration of a non-ideality between the incident channel and the quadrature channel of the system, the calibration comprising determining the non-ideality by controlling the sensor signal, an oscillation signal for the incident channel, and an oscillation signal for the quadrature channel; and correcting for the non-ideality.
    Type: Application
    Filed: September 19, 2023
    Publication date: February 22, 2024
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Tejasvi DAS, Siddharth MARU, John L. MELANSON
  • Patent number: 11835410
    Abstract: A method for determining sensor parameters of an actively-driven sensor system may include performing an initialization operation to establish a baseline estimate of the sensor parameters, obtaining as few as three samples of a measured physical quantity versus frequency for the actively-driven sensor system, performing a refinement operation to provide a refined version of the sensor parameters based on the as few as three samples, iteratively repeating the refinement operation until the difference between successive refined versions of the sensor parameters is below a defined threshold, and outputting the refined sensor parameters as updated sensor parameters for the actively-driven sensor system.
    Type: Grant
    Filed: October 26, 2020
    Date of Patent: December 5, 2023
    Assignee: Cirrus Logic Inc.
    Inventors: Michael A. Kost, Tejasvi Das, Marc J. Kobayashi, Siddharth Maru, Rahul Gawde
  • Patent number: 11821761
    Abstract: A system may include a resistive-inductive-capacitive sensor configured to sense a physical quantity, and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to measure one or more resonance parameters associated with the resistive-inductive-capacitive sensor and indicative of the physical quantity and, in order to maximize dynamic range in determining the physical quantity from the one or more resonance parameters, dynamically modify, across the dynamic range, either of reliance on the one or more resonance parameters in determining the physical quantity or one or more resonance properties of the resistive-inductive-capacitive sensor.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: November 21, 2023
    Assignee: Cirrus Logic Inc.
    Inventors: Tejasvi Das, Siddharth Maru, John L. Melanson
  • Patent number: 11808669
    Abstract: A system may include a resonant sensor configured to sense a physical quantity, a measurement circuit communicatively coupled to the resonant sensor and configured to measure one or more resonance parameters associated with the resonant sensor and indicative of the physical quantity using an incident/quadrature detector having an incident channel and a quadrature channel and perform a calibration of a non-ideality between the incident channel and the quadrature channel of the system, the calibration comprising determining the non-ideality by controlling the sensor signal, an oscillation signal for the incident channel, and an oscillation signal for the quadrature channel; and correcting for the non-ideality.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: November 7, 2023
    Assignee: Cirrus Logic Inc.
    Inventors: Tejasvi Das, Siddharth Maru, John L Melanson
  • Publication number: 20230252865
    Abstract: A system may include driving circuitry configured to drive a driving signal to an output transducer, sensing circuitry configured to sense a physical quantity associated with the output transducer in response to the driving signal, and interference detection circuitry configured to detect the presence of interference of the system and mitigate the effect of the interference in the system.
    Type: Application
    Filed: April 22, 2022
    Publication date: August 10, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Siddharth MARU, Tejasvi DAS
  • Patent number: 11714113
    Abstract: A system may include a resistive-inductive-capacitive sensor, a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency, and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to determine a measured change in a resonant frequency of the resistive-inductive-capacitive sensor and based on the measured change, modify the driving frequency.
    Type: Grant
    Filed: August 24, 2022
    Date of Patent: August 1, 2023
    Assignee: Cirrus Logic, Inc.
    Inventors: Siddharth Maru, Vadim Konradi, Matthew Beardsworth, Tejasvi Das
  • Publication number: 20230170854
    Abstract: An amplifier system may include a first feedback loop coupled between an output of an amplifier to an input of a modulator for regulating an output voltage driven at the output of the amplifier to a first terminal of a load of the amplifier system, a sense resistor for sensing a physical quantity associated with the amplifier, a second control loop coupled to the sense resistor such that the sense resistor is outside of the second control loop, the second control loop configured to regulate a common-mode voltage at a second terminal of the load, and a common-mode feedforward circuit coupled to the sense resistor and configured to minimize effects of a signal-dependent common-mode feedback of the sense resistor.
    Type: Application
    Filed: May 9, 2022
    Publication date: June 1, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Siddharth MARU, Chandra B. PRAKASH, Tejasvi DAS
  • Publication number: 20230146592
    Abstract: Circuitry for driving a load, the circuitry comprising: driver circuitry; and load sensing circuitry, wherein the circuitry is operable in: a driving mode of operation in which the driver circuitry supplies a drive signal to a load coupled to the circuitry; and a load sensing mode of operation, for estimating a characteristic of a load coupled to the circuitry based on a signal output by the load sensing circuitry in response to a stimulus signal, wherein the circuitry is configured to, in response to a request for operation of the circuitry in the load sensing mode: compare an indication of a current through the load to a predefined threshold; and if the indication of the current through the load meets the predefined threshold, prevent or delay operation in the load sensing mode.
    Type: Application
    Filed: April 26, 2022
    Publication date: May 11, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Chandra B. PRAKASH, Tejasvi DAS, Cory J. PETERSON, Siddharth MARU
  • Publication number: 20230147894
    Abstract: Circuitry comprising: a voltage monitoring path; a current monitoring path; a reference element of a predefined impedance; and processing circuitry, wherein in operation of the circuitry in a calibration mode of operation: the voltage monitoring path is operative to output a signal indicative of a voltage across the reference element in response to a reference signal applied to the reference element; the current monitoring path is operative to output a signal indicative of a current through the reference element in response to the reference signal; and the processing circuitry is operative to: receive the signal indicative of the voltage across the reference element and the signal indicative of the current through the reference element; generate an estimate of an impedance of the reference element; and determine a compensation parameter for an element of the circuitry for compensating for a difference between the estimate of the impedance and the predefined impedance of the reference element.
    Type: Application
    Filed: March 9, 2022
    Publication date: May 11, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Ryan A. HELLMAN, Viral PARIKH, Siddharth MARU, Tejasvi DAS
  • Publication number: 20230147461
    Abstract: Circuitry for driving a load, the circuitry comprising: driver circuitry; load sensing circuitry; and a parameter estimation engine, wherein the circuitry is operable in: a driving mode of operation in which the driver circuitry supplies a drive signal to a load coupled to the circuitry; and a load sensing mode of operation, for estimating a characteristic of a load coupled to the circuitry based on a signal output by the load sensing circuitry in response to a stimulus signal supplied to the driver circuitry, and wherein the circuitry is operable to perform a calibration operation in which the parameter estimation engine generates a circuit parameter for use in the load sensing mode based, at least in part, on a signal generated by the circuitry in response to a calibration stimulus signal supplied to the driver circuitry.
    Type: Application
    Filed: March 9, 2022
    Publication date: May 11, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Chandra B. PRAKASH, Tejasvi DAS, Siddharth MARU
  • Publication number: 20230144960
    Abstract: A system may include amplifier circuitry configured to drive an electromagnetic load with a driving signal and a processing system communicatively coupled to the electromagnetic load and configured to compensate for current-sensing error of the processing system caused by feedback circuitry of the amplifier circuitry.
    Type: Application
    Filed: June 22, 2022
    Publication date: May 11, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Anand ILANGO, Siddharth MARU, Tejasvi DAS, John L. MELANSON
  • Patent number: 11644494
    Abstract: Circuitry for driving a load, the circuitry comprising: driver circuitry; load sensing circuitry; and a parameter estimation engine, wherein the circuitry is operable in: a driving mode of operation in which the driver circuitry supplies a drive signal to a load coupled to the circuitry; and a load sensing mode of operation, for estimating a characteristic of a load coupled to the circuitry based on a signal output by the load sensing circuitry in response to a stimulus signal supplied to the driver circuitry, and wherein the circuitry is operable to perform a calibration operation in which the parameter estimation engine generates a circuit parameter for use in the load sensing mode based, at least in part, on a signal generated by the circuitry in response to a calibration stimulus signal supplied to the driver circuitry.
    Type: Grant
    Filed: March 9, 2022
    Date of Patent: May 9, 2023
    Assignee: Cirrus Logic, Inc.
    Inventors: Chandra B. Prakash, Tejasvi Das, Siddharth Maru
  • Patent number: 11644521
    Abstract: Circuitry comprising: a voltage monitoring path; a current monitoring path; a reference element of a predefined impedance; and processing circuitry, wherein in operation of the circuitry in a calibration mode of operation: the voltage monitoring path is operative to output a signal indicative of a voltage across the reference element in response to a reference signal applied to the reference element; the current monitoring path is operative to output a signal indicative of a current through the reference element in response to the reference signal; and the processing circuitry is operative to: receive the signal indicative of the voltage across the reference element and the signal indicative of the current through the reference element; generate an estimate of an impedance of the reference element; and determine a compensation parameter for an element of the circuitry for compensating for a difference between the estimate of the impedance and the predefined impedance of the reference element.
    Type: Grant
    Filed: March 9, 2022
    Date of Patent: May 9, 2023
    Assignee: Cirrus Logic, Inc.
    Inventors: Ryan A. Hellman, Viral Parikh, Siddharth Maru, Tejasvi Das
  • Patent number: 11619519
    Abstract: A system may include a plurality of sensors, a measurement circuit communicatively coupled to the plurality of sensors and configured to measure one or more physical quantities associated with the plurality of sensors, and a predictive optimization subsystem configured to detect an event associated with a first sensor of the plurality of sensors and responsive to the event, execute a predictive action with respect to one or more of the other sensors of the plurality of sensors.
    Type: Grant
    Filed: February 8, 2021
    Date of Patent: April 4, 2023
    Assignee: Cirrus Logic, Inc.
    Inventors: Luke Lapointe, Siddharth Maru, Tejasvi Das
  • Publication number: 20230082721
    Abstract: A system may include an array of sensor elements, the array of sensor elements each comprising a first type of passive reactive element, a second type of passive reactive element electrically coupled to the array of sensor elements, a driver configured to drive the array of sensor elements and the second type of passive reactive element, and control circuitry configured to control enabling and disabling of individual sensor elements of the array of sensor elements to ensure no more than one of the array of sensor elements is enabled at a time such that when one of the array of sensor elements is enabled, the one of the array of sensor elements and the second type of passive reactive element together operate as a resonant sensor.
    Type: Application
    Filed: November 3, 2022
    Publication date: March 16, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Jason L. WARDLAW, Michael A. KOST, Anthony S. DOY, Tejasvi DAS, Siddharth MARU, Xin ZHAO, Matthew BEARDSWORTH, Bruce E. DUEWER