公开(公告)号：US20240056039A1

公开(公告)日：2024-02-15

申请号：US17885719

申请日：2022-08-11

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Matthew BEARDSWORTH ,  John L. MELANSON

IPC: H03F3/217 ,  H03F1/02

CPC classification number: H03F3/2173 ,  H03F1/0222 ,  H03F2200/105

Abstract: Switching amplifier circuitry for driving an inductive load, the switching amplifier circuitry comprising modulator circuitry and output stage circuitry, wherein the switching amplifier circuitry is configured to: while the modulator circuitry is outputting a modulated output signal that gives rise to ripple current in the load: adjust a switching frequency of the modulator circuitry over a predetermined range of frequencies; monitor a power of the switching amplifier circuitry as the switching frequency is adjusted over the predetermined range of frequencies; and select, as an operational switching frequency for the modulator circuitry, a frequency within the predetermined range of frequencies at which the monitored power meets a predefined criterion.

公开(公告)号：US20230082721A1

公开(公告)日：2023-03-16

申请号：US17980429

申请日：2022-11-03

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jason L. WARDLAW ,  Michael A. KOST ,  Anthony S. DOY ,  Tejasvi DAS ,  Siddharth MARU ,  Xin ZHAO ,  Matthew BEARDSWORTH ,  Bruce E. DUEWER

IPC: G01R27/28 ,  G01R27/26 ,  G01R27/02 ,  G01H13/00 ,  G01L9/00 ,  G06F3/01

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.

公开(公告)号：US20200271745A1

公开(公告)日：2020-08-27

申请号：US16455437

申请日：2019-06-27

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Tejasvi DAS ,  Siddharth MARU ,  Matthew BEARDSWORTH ,  Bruce E. DUEWER ,  Michael A. KOST

IPC: G01R35/00 ,  G01R27/02 ,  G01R23/02

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.

公开(公告)号：US20200271477A1

公开(公告)日：2020-08-27

申请号：US16455462

申请日：2019-06-27

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Michael A. KOST ,  Bruce E. DUEWER ,  Tejasvi DAS ,  Matthew BEARDSWORTH ,  Anthony S. DOY

IPC: G01D5/14 ,  G01D5/16 ,  G01D5/20 ,  G01D5/24

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.

公开(公告)号：US20190302161A1

公开(公告)日：2019-10-03

申请号：US16267079

申请日：2019-02-04

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Zhong YOU ,  Siddharth MARU ,  Tejasvi DAS ,  Luke LAPOINTE ,  Eric J. KING ,  Anthony S. DOY ,  Srdjan MARJIANOVIC ,  Drew KINNEY ,  Matthew BEARDSWORTH ,  Emmanuel MARCHAIS

IPC: G01R27/26 ,  G01R27/02

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.

公开(公告)号：US20240250324A1

公开(公告)日：2024-07-25

申请号：US18313821

申请日：2023-05-08

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Matthew BEARDSWORTH

IPC: H01M10/48 ,  G01K7/16 ,  G01R31/36 ,  G01R31/367 ,  H01M10/6571 ,  H02J50/10 ,  H04B5/00

CPC classification number: H01M10/486 ,  G01K7/16 ,  G01R31/3648 ,  G01R31/367 ,  H01M10/6571 ,  H02J50/10 ,  H04B5/0037

Abstract: A system and method may include a coil and a coil resistance and temperature reporting system electrically coupled to the coil and configured to monitor a direct current resistance of the coil and estimate a temperature of the coil based on the direct current resistance.

公开(公告)号：US20240248539A1

公开(公告)日：2024-07-25

申请号：US18609028

申请日：2024-03-19

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Tejasvi DAS ,  Matthew BEARDSWORTH ,  Michael A. KOST ,  Gavin MCVEIGH ,  Hamid SEPEHR ,  Carl L. STÅHL

IPC: G06F3/01 ,  B06B1/02 ,  B06B1/04 ,  G08B6/00

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.

公开(公告)号：US20240231601A1

公开(公告)日：2024-07-11

申请号：US18601585

申请日：2024-03-11

Applicant: Cirrus Logic International Semiconductor Ltd.

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 ,  G01L5/162 ,  G01L5/164 ,  G01L5/165 ,  G01L5/167 ,  G06F3/041

CPC classification number: G06F3/0488 ,  G06F3/0412 ,  G06F3/0414 ,  G01L5/162 ,  G01L5/164 ,  G01L5/165 ,  G01L5/167 ,  G06F2203/04105 ,  H04M2250/22

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.

公开(公告)号：US20230259214A1

公开(公告)日：2023-08-17

申请号：US18306472

申请日：2023-04-25

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Tejasvi DAS ,  Matthew BEARDSWORTH ,  Michael A. KOST ,  Gavin MCVEIGH ,  Hamid SEPEHR ,  Carl L. STÅHL

IPC: G06F3/01 ,  G08B6/00 ,  B06B1/04 ,  B06B1/02

CPC classification number: G06F3/016 ,  G08B6/00 ,  B06B1/045 ,  B06B1/0207 ,  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.

公开(公告)号：US20220404409A1

公开(公告)日：2022-12-22

申请号：US17894429

申请日：2022-08-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Siddharth MARU ,  Vadim KONRADI ,  Matthew BEARDSWORTH ,  Tejasvi DAS

IPC: G01R27/28 ,  G01D5/243

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.