Patents by Inventor Tejasvi Das

Tejasvi Das 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).

  • Patent number: 11150733
    Abstract: Embodiments described herein relate to methods and apparatuses for providing a haptic output signal to a haptic actuator. A controller comprises an input configured to receive a force sensor signal from at least one force sensor; and a haptic output module configured to generate a haptic output signal for output to a haptic actuator; wherein the haptic output module is configured to: responsive to determining that the force sensor signal indicates that a force level applied to the at least one force sensor exceeds a first threshold, trigger output of the haptic output signal; and during output of the haptic output signal, adjust the haptic output signal based on the force sensor signal.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: October 19, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Tejasvi Das, Michael A. Kost, Matthew Beardsworth
  • Patent number: 11092657
    Abstract: A system may include a resonant phase sensing system comprising a resistive-inductive-capacitive sensor and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor, and a compensation circuit. The measurement circuit may be configured to use a phase detector to measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a metal plate relative to the resistive-inductive-capacitive sensor. The compensation circuit may be configured to detect a change in a physical property associated with the resistive-inductive-capacitive sensor other than the displacement and compensate the phase information to correct for the change in the physical property.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: August 17, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Siddharth Maru, Tejasvi Das, Zhong You
  • Patent number: 11093060
    Abstract: A system may include a resistive-inductive-capacitive sensor, a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to measure phase information and amplitude associated with the resistive-inductive-capacitive sensor, and a noise detection circuit communicatively coupled to the measurement circuit and configured to determine a presence of external interference in the system based on at least one of the phase information and the amplitude information.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: August 17, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Gregory C. Yancey, Michael Kost, Tejasvi Das, Siddharth Maru, Matthew Beardsworth, Vadim Konradi
  • Patent number: 11079874
    Abstract: A method may include receiving an input signal from a force sensor configured to sense a force associated with a human interaction with a virtual button, comparing the input signal to at least one behavioral model, the at least one behavioral model comprising one or more parameters associated with a valid human interaction with the virtual button, and determining whether a valid human interaction with the virtual button occurred based on the comparing.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: August 3, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Luke Lapointe, Tejasvi Das, Siddharth Maru
  • Patent number: 11070203
    Abstract: A driver system may include a first n-type field-effect transistor coupled at its non-gate terminals between an output of the driver system and a first terminal of a supply voltage and configured to drive the output when the first n-type field-effect transistor is activated, a second n-type field-effect transistor coupled at its non-gate terminals between an output of the driver system and a second terminal of the supply voltage and configured to drive the output when the second n-type field-effect transistor is activated, a high-side capacitor coupled to the output of the driver system, and a low-side capacitor coupled to the second terminal of the supply voltage, wherein the high-side capacitor and the low-side capacitor are configured to track and correct for mismatches between a first resistance of the first n-type field-effect transistor and a second resistance of the second n-type field-effect transistor.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: July 20, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Jing Bai, Tejasvi Das, Xin Zhao, Lei Zhu, Xiaofan Fei
  • Publication number: 20210200316
    Abstract: Embodiments described herein relate to methods and apparatuses for controlling an operation of a vibrational output system and/or an operation of an input sensor system, wherein the controller is for use in a device comprising the vibrational output system and the input sensor system. A controller comprises an input configured to receive an indication of activation or de-activation of an output of the vibrational output system; and an adjustment module configured to adjust the operation of the vibrational output system and/or the operation of the input sensor system based on the indication to reduce an interference expected to be caused by the output of the vibrational output system on the input sensory system.
    Type: Application
    Filed: March 3, 2021
    Publication date: July 1, 2021
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Tejasvi DAS, Matthew BEARDSWORTH, Michael A. KOST, Gavin MCVEIGH, Hamid SEPEHR, Carl L. STÅHL
  • Patent number: 11047890
    Abstract: A method of determining a phase misalignment between a first signal generated from a first signal path and a second signal generated from a second signal path may include obtaining multiple samples of the first signal proximate to when the first signal crosses zero wherein the first signal can be approximated as linear; obtaining multiple samples of the second signal proximate to when the second signal crosses zero wherein the first signal can be approximated as linear; based on the multiple samples of the first signal, approximating a first time at which the first signal crosses zero; based on the multiple samples of the second signal, approximating a second time at which the second signal crosses zero; and determining the phase misalignment between the first signal and the second signal based on a difference between the first time and the second time.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: June 29, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Gautham S. Sivasankar, Tejasvi Das, Emmanuel Marchais, Amar Vellanki, Leyi Yin, John L. Melanson, Venugopal Choukinishi
  • Patent number: 11016572
    Abstract: A system may include a tactile actuator for providing tactile feedback and a resonant phase sensing system. The resonant phase sensing system may include a resistive-inductive-capacitive sensor and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and the tactile actuator. The resistive-inductive-capacitive sensor may be configured to measure phase information associated with the resistive-inductive-capacitive sensor, based on the phase information, detect an indication of human interaction with the system proximate to the resistive-inductive-capacitive sensor, and trigger the tactile actuator to generate tactile feedback responsive to detecting the indication of human interaction.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: May 25, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Srdjan Marijanovic, Drew Kinney, Luke Lapointe, Siddharth Maru, Tejasvi Das, Anthony S. Doy, Zhong You
  • Publication number: 20210149538
    Abstract: A method may include receiving an input signal from a force sensor configured to sense a force associated with a human interaction with a virtual button, comparing the input signal to at least one behavioral model, the at least one behavioral model comprising one or more parameters associated with a valid human interaction with the virtual button, and determining whether a valid human interaction with the virtual button occurred based on the comparing.
    Type: Application
    Filed: May 5, 2020
    Publication date: May 20, 2021
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Luke LAPOINTE, Tejasvi DAS, Siddharth MARU
  • Publication number: 20210140797
    Abstract: A system may include at least one resistive-inductive-capacitive sensor and a control circuit configured to maintain timing parameters for operation of the at least one resistive-inductive-capacitive sensor and vary at least one of the timing parameters to control a spectrum associated with the at least one resistive-inductive-capacitive sensor, wherein the spectrum comprises one of a sensor activity spectrum of the at least one resistive-inductive-capacitive sensor and a current usage spectrum associated with electrical current delivered to the at least one resistive-inductive-capacitive sensor from a source of electrical energy.
    Type: Application
    Filed: January 25, 2021
    Publication date: May 13, 2021
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Michael A. KOST, Bruce E. DUEWER, Tejasvi DAS, Matthew BEARDSWORTH, Anthony S. DOY
  • Publication number: 20210124444
    Abstract: A system may include a resistive-inductive-capacitive sensor, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to at a plurality of periodic intervals, measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a mechanical member relative to the resistive-inductive-capacitive sensor. The system may also include a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency and a driving amplitude, wherein at least one of the driving frequency and the driving amplitude varies among the plurality of periodic intervals.
    Type: Application
    Filed: January 6, 2021
    Publication date: April 29, 2021
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Siddharth MARU, Tejasvi DAS, Luke LAPOINTE, Srdjan MARIJANOVIC, Zhong YOU, Drew KINNEY, Anthony S. DOY, Eric J. KING
  • Patent number: 10976825
    Abstract: Embodiments described herein relate to methods and apparatuses for controlling an operation of a vibrational output system and/or an operation of an input sensor system, wherein the controller is for use in a device comprising the vibrational output system and the input sensor system. A controller comprises an input configured to receive an indication of activation or de-activation of an output of the vibrational output system; and an adjustment module configured to adjust the operation of the vibrational output system and/or the operation of the input sensor system based on the indication to reduce an interference expected to be caused by the output of the vibrational output system on the input sensory system.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: April 13, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Tejasvi Das, Matthew Beardsworth, Michael Allan Kost, Gavin McVeigh, Hamid Sepehr, Carl L. Ståhl
  • Patent number: 10948313
    Abstract: A system may include at least one resistive-inductive-capacitive sensor and a control circuit configured to maintain timing parameters for operation of the at least one resistive-inductive-capacitive sensor and vary at least one of the timing parameters to control a spectrum associated with the at least one resistive-inductive-capacitive sensor, wherein the spectrum comprises one of a sensor activity spectrum of the at least one resistive-inductive-capacitive sensor and a current usage spectrum associated with electrical current delivered to the at least one resistive-inductive-capacitive sensor from a source of electrical energy.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: March 16, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Michael A. Kost, Bruce E. Duewer, Tejasvi Das, Matthew Beardsworth, Anthony S. Doy
  • Patent number: 10942610
    Abstract: A system may include a resistive-inductive-capacitive sensor, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to at a plurality of periodic intervals, measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a mechanical member relative to the resistive-inductive-capacitive sensor. The system may also include a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency and a driving amplitude, wherein at least one of the driving frequency and the driving amplitude varies among the plurality of periodic intervals.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: March 9, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Siddharth Maru, Tejasvi Das, Luke Lapointe, Srdjan Marijanovic, Zhong You, Drew Kinney, Anthony S. Doy, Eric J. King
  • Patent number: 10935620
    Abstract: A system may include a resistive-inductive-capacitive sensor, a driver configured to drive the resistive-inductive-capacitive sensor with a driving signal at a driving frequency, and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to, during a calibration phase of the measurement circuit, measure phase and amplitude information associated with the resistive-inductive-capacitive sensor and based on the phase and amplitude information, determine at least one of a resonant frequency of the resistive-inductive-capacitive sensor and a transfer function of the resistive-inductive-capacitive sensor.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: March 2, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Tejasvi Das, Siddharth Maru, Matthew Beardsworth, Bruce E. Duewer, Michael A. Kost
  • Patent number: 10921159
    Abstract: A system may include a first resistive-inductive-capacitive sensor, a second resistive-inductive-capacitive sensor, and a measurement circuit communicatively coupled to the first resistive-inductive-capacitive sensor and the second resistive-inductive-capacitive sensor and configured to measure first phase information associated with the first resistive-inductive-capacitive sensor, measure second phase information associated with the second resistive-inductive-capacitive sensor, and based on the first phase information and the second phase information, determine a displacement of a mechanical member relative to the first resistive-inductive-capacitive sensor.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: February 16, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Tejasvi Das, Zhong You, Siddharth Maru, Eric J. King, Johann G. Gaboriau, Luke Lapointe, Matthew Beardsworth
  • Publication number: 20210034213
    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: Application
    Filed: October 21, 2020
    Publication date: February 4, 2021
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Hamid SEPEHR, Pablo PESO PARADA, Willem ZWART, Tom BIRCHALL, Michael Allen KOST, Tejasvi DAS, Siddharth MARU, Matthew BEARDSWORTH, Bruce E. DUEWER
  • Patent number: 10908200
    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 measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a mechanical member relative to the resistive-inductive-capacitive sensor, wherein the displacement of the mechanical member causes a change in an impedance of the resistive-inductive-capacitive sensor.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: February 2, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Zhong You, Siddharth Maru, Tejasvi Das, Luke Lapointe, Eric J. King, Anthony S. Doy, Srdjan Marjianovic, Drew Kinney, Matthew Beardsworth, Emmanuel Marchais
  • Publication number: 20200387225
    Abstract: Embodiments described herein relate to methods and apparatuses for providing a haptic output signal to a haptic actuator. A controller comprises an input configured to receive a force sensor signal from at least one force sensor; and a haptic output module configured to generate a haptic output signal for output to a haptic actuator; wherein the haptic output module is configured to: responsive to determining that the force sensor signal indicates that a force level applied to the at least one force sensor exceeds a first threshold, trigger output of the haptic output signal; and during output of the haptic output signal, adjust the haptic output signal based on the force sensor signal.
    Type: Application
    Filed: October 23, 2019
    Publication date: December 10, 2020
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Tejasvi DAS, Michael A. KOST, Matthew BEARDSWORTH
  • Publication number: 20200386804
    Abstract: A system may include a sensor having a variable phase response, a dummy impedance having a known phase response, and a measurement circuit communicatively coupled to the sensor and configured to measure first phase information associated with the sensor, measure second phase information associated with the dummy impedance, and determine a phase response of the measurement circuit based on a comparison of the first phase information to the second phase information.
    Type: Application
    Filed: October 21, 2019
    Publication date: December 10, 2020
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Tejasvi DAS, Siddharth MARU, Xin ZHAO, Matthew BEARDSWORTH, Michael A. KOST, John L. MELANSON