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公开(公告)号：US10008992B1
公开(公告)日：2018-06-26
申请号：US15487555
申请日：2017-04-14
Inventor： Lei Zhu , Xin Zhao , Alan Mark Morton , Tejasvi Das , Ku He , Xiaofan Fei
CPC classification number: H03F3/2178 , H03F1/0277 , H03F3/30 , H03F2200/03 , H03F2200/411 , H03F2200/432
Abstract: An amplifier may include a final output stage switchable among a plurality of modes comprising a mode which is enabled by coupling an output driver to an output of the final output stage and a preconditioning circuit coupled to the output of the final output stage. The preconditioning circuit may be configured to precondition at least one of a voltage and a current of the output of the final output stage prior to coupling the output driver to the output of the final output stage to limit audio artifacts caused by switching the final output stage to the mode or may be configured to perform a switching sequence to switch between a first mode and a second mode of the plurality of modes, such that at all points of the switching sequence, output terminals of the output of the final output stage have a known impedance.
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公开(公告)号：US09880802B2
公开(公告)日：2018-01-30
申请号：US15003371
申请日：2016-01-21
Inventor： Aniruddha Satoskar , Daniel J. Allen , Edmund Mark Schneider , Tejasvi Das , Ku He , John L. Melanson
CPC classification number: G06F3/165 , G10L25/09 , H03M1/0617 , H03M1/12 , H03M1/188
Abstract: A processing path may include a controller and a plurality of processing paths including a first processing path and a second processing path. The first path may be configured to generate a first digital signal based on an analog input signal and the second path may be configured to generate a second digital signal based on the analog input signal, wherein the first path has a lower gain and a higher noise floor than the second path. The controller may be configured to determine that a transition between the first path and the second path needs to occur based on the analog input signal crossing a threshold or a prediction that the input signal will cross the threshold and in response to determining the transition between the first path and the second path needs to occur, blend the transition during or near zero cross points of the analog input signal.
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公开(公告)号：US09813814B1
公开(公告)日：2017-11-07
申请号：US15244670
申请日：2016-08-23
Inventor： Aniruddha Satoskar , Tejasvi Das , Ku He
IPC: H04R3/00 , H04R3/04 , H03G3/30 , H03K5/1536
CPC classification number: H04R3/04 , H03G3/02 , H03G3/3005 , H03G3/3089 , H03K5/1536
Abstract: In accordance with embodiments of the present disclosure, an apparatus for providing an output signal to an audio transducer may include a signal path and a control circuit. The signal path may include an analog signal path portion having an audio input for receiving an analog signal, an audio output for providing an output signal, and a selectable analog gain, and configured to generate the output signal based on the analog signal and in conformity with the selectable analog gain and a digital path portion having a selectable digital gain and configured to receive a digital input signal and convert the digital input signal into the analog signal in conformity with the selectable digital gain. The control circuit may be configured to determine a spectral content of a signal indicative of the output signal and change the selectable digital gain and the selectable analog gain based on the spectral content.
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公开(公告)号：US20170212721A1
公开(公告)日：2017-07-27
申请号：US15003371
申请日：2016-01-21
Inventor： Aniruddha Satoskar , Daniel J. Allen , Edmund Mark Schneider , Tejasvi Das , Ku He , John L. Melanson
CPC classification number: G06F3/165 , G10L25/09 , H03M1/0617 , H03M1/12 , H03M1/188
Abstract: A processing path may include a controller and a plurality of processing paths including a first processing path and a second processing path. The first path may be configured to generate a first digital signal based on an analog input signal and the second path may be configured to generate a second digital signal based on the analog input signal, wherein the first path has a lower gain and a higher noise floor than the second path. The controller may be configured to determine that a transition between the first path and the second path needs to occur based on the analog input signal crossing a threshold or a prediction that the input signal will cross the threshold and in response to determining the transition between the first path and the second path needs to occur, blend the transition during or near zero cross points of the analog input signal.
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公开(公告)号：US12130647B2
公开(公告)日：2024-10-29
申请号：US17508204
申请日：2021-10-22
Inventor： Tejasvi Das , Siddharth Maru , Cory J. Peterson
CPC classification number: G05F1/56 , G01R19/0092 , G01R27/16
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.
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Patent Agency Ranking
公开(公告)号：US12130159B2
公开(公告)日：2024-10-29
申请号：US16532850
申请日：2019-08-06
Inventor： Siddharth Maru , Tejasvi Das , Zhong You , Johann G. Gaboriau , Matthew Beardsworth , Gregory C. Yancey
CPC classification number: G01D5/243 , G01D5/14 , G01D5/16 , G01D5/20 , G01D5/24 , G06F3/01 , H03K17/9522 , H03K17/9537
Abstract: A system may include a resistive-inductive-capacitive sensor, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor, and a filter communicatively coupled to the measurement circuit. The measurement circuit may be 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. The filter may be configured to isolate changes to the displacement which are significantly slower than an expected change to the displacement in response to a human interaction with the mechanical member.
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公开(公告)号：US11972057B2
公开(公告)日：2024-04-30
申请号：US18306472
申请日：2023-04-25
Inventor： Tejasvi Das , Matthew Beardsworth , Michael A. Kost , Gavin McVeigh , Hamid Sepehr , Carl L. Ståhl
CPC classification number: G06F3/016 , B06B1/0207 , B06B1/045 , G08B6/00 , B06B2201/53
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.
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公开(公告)号：US11947756B2
公开(公告)日：2024-04-02
申请号：US17968565
申请日：2022-10-18
Inventor： Josh Sanz-Robinson , Siddharth Maru , Tejasvi Das
CPC classification number: G06F3/0418 , G06F3/02 , G06F3/0414 , G06F3/016
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.
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公开(公告)号：US11835410B2
公开(公告)日：2023-12-05
申请号：US17079709
申请日：2020-10-26
Inventor： Michael A. Kost , Tejasvi Das , Marc J. Kobayashi , Siddharth Maru , Rahul Gawde
CPC classification number: G01L27/00 , G01L1/142 , G01L1/16 , G01L1/22 , G06F3/0414
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.
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公开(公告)号：US11808669B2
公开(公告)日：2023-11-07
申请号：US17215117
申请日：2021-03-29
Inventor： Tejasvi Das , Siddharth Maru , John L Melanson
CPC classification number: G01N27/025 , G01N27/028
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.
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