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公开(公告)号：US20190302923A1
公开(公告)日：2019-10-03
申请号：US16294311
申请日：2019-03-06
Inventor： Siddharth MARU , Tejasvi DAS , Luke LAPOINTE , Srdjan MARIJANOVIC , Zhong YOU , Drew KINNEY , Anthony S. DOY , Eric J. KING
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.
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公开(公告)号：US20180091102A1
公开(公告)日：2018-03-29
申请号：US15277465
申请日：2016-09-27
Inventor： Xin ZHAO , Tejasvi DAS , Xiaofan FEI , Alan Mark MORTON
CPC classification number: H03F3/2171 , H03F1/32 , H03F1/342 , H03F3/181 , H03F3/187 , H03F3/217 , H03F3/2173 , H03F3/38 , H03F3/72 , H03F2200/345 , H03F2200/351
Abstract: An amplifier may include a first stage configured to receive an input signal at an amplifier input and generate an intermediate signal which is a function of the input signal, and a final output stage configured to generate an output signal which is a function of the intermediate signal at an amplifier output, and a signal feedback network coupled between the amplifier output and input. The final output stage may be switchable among a plurality of modes including at least a first mode in which the final output stage generates the output signal as a modulated output signal which is a function of the intermediate signal, and a second mode in which the final output stage generates the output signal as an unmodulated output signal which is a function of the intermediate signal. Structure of the feedback network and the first stage may remain static when switching between modes.
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公开(公告)号：US20240168506A1
公开(公告)日：2024-05-23
申请号：US18280859
申请日：2022-03-14
Inventor： Tejasvi DAS , Siddharth MARU , Cory J. PETERSON , John L. MELANSON
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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公开(公告)号：US20230170854A1
公开(公告)日：2023-06-01
申请号：US17739480
申请日：2022-05-09
Inventor： Siddharth MARU , Chandra B. PRAKASH , Tejasvi DAS
CPC classification number: H03F3/04 , B06B1/0207 , H03F2200/129 , H03F2200/481
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.
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公开(公告)号：US20230147461A1
公开(公告)日：2023-05-11
申请号：US17690402
申请日：2022-03-09
Inventor： Chandra B. PRAKASH , Tejasvi DAS , Siddharth MARU
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.
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Patent Agency Ranking
公开(公告)号：US20220357757A1
公开(公告)日：2022-11-10
申请号：US17508204
申请日：2021-10-22
Inventor： Tejasvi DAS , Siddharth MARU , Cory J. PETERSON
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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公开(公告)号：US20220337235A1
公开(公告)日：2022-10-20
申请号：US17848051
申请日：2022-06-23
Inventor： Matthew BEARDSWORTH , Tejasvi DAS , Siddharth MARU , Luke LAPOINTE
IPC: H03K17/14 , H03K17/975 , H03K17/97
Abstract: A system may include a sensor configured to output a sensor signal indicative of a distance between the sensor and a mechanical member associated with the sensor, a measurement circuit communicatively coupled to the sensor and configured to determine a physical force interaction with the mechanical member based on the sensor signal, and a compensator configured to monitor the sensor signal and to apply a compensation factor to the sensor signal to compensate for changes to properties of the sensor based on at least one of changes in a distance between the sensor and the mechanical member and changes in a temperature associated with the sensor.
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公开(公告)号：US20220308000A1
公开(公告)日：2022-09-29
申请号：US17215117
申请日：2021-03-29
Inventor： Tejasvi DAS , Siddharth MARU , John L. MELANSON
IPC: G01N27/02
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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公开(公告)号：US20210405840A1
公开(公告)日：2021-12-30
申请号：US17471529
申请日：2021-09-10
Inventor： Hamid SEPEHR , Pablo PESO PARADA , Willem ZWART , Tom BIRCHALL , Michael Allen KOST , Tejasvi DAS , Siddharth MARU , Matthew BEARDSWORTH , Bruce E. DUEWER
IPC: G06F3/0488 , G06F3/041
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.
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公开(公告)号：US20210140797A1
公开(公告)日：2021-05-13
申请号：US17157304
申请日：2021-01-25
Inventor： Michael A. KOST , Bruce E. DUEWER , Tejasvi DAS , Matthew BEARDSWORTH , Anthony S. DOY
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.
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