公开(公告)号：US20210149538A1

公开(公告)日：2021-05-20

申请号：US16867223

申请日：2020-05-05

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Luke LAPOINTE ,  Tejasvi DAS ,  Siddharth MARU

IPC: G06F3/041 ,  G06F21/50 ,  G06F3/0488

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.

公开(公告)号：US20200225786A1

公开(公告)日：2020-07-16

申请号：US16831323

申请日：2020-03-26

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Siddharth MARU ,  Tejasvi DAS ,  Luke LAPOINTE ,  Srdjan MARIJANOVIC ,  Zhong YOU ,  Drew KINNEY ,  Anthony S. DOY ,  Eric J. KING

IPC: G06F3/044 ,  G06F3/041 ,  G06F3/045 ,  G01D5/243 ,  G01D5/20

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.

公开(公告)号：US20190386561A1

公开(公告)日：2019-12-19

申请号：US16441449

申请日：2019-06-14

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Eric J. KING ,  Siddharth MARU ,  Thomas HOFF ,  Graeme G. MACKAY

IPC: H02M1/42 ,  G05F1/46 ,  H02M3/158

Abstract: A method may include controlling switching behavior of switches of a switch-mode power supply based on a desired physical quantity associated with the switch-mode power supply, wherein the desired physical quantity is based at least in part on a slope compensation signal, generating the slope compensation signal to have a compensation value of approximately zero as seen by a compensation control loop of the switch-mode power supply, and modifying the slope compensation signal on successive switching cycles of the switch-mode power supply to account for differences in an output of the compensation control loop and an average current of an inductor of the switch-mode power supply in at least one phase of a switching period of a switching cycle of the switch-mode power supply.

公开(公告)号：US20170271996A1

公开(公告)日：2017-09-21

申请号：US15282790

申请日：2016-09-30

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Eric J. KING ,  Zhaohui HE ,  Siddharth MARU ,  John L. MELANSON

IPC: H02M5/293

CPC classification number: H03F3/2171 ,  H02M5/293 ,  H02M2005/2932 ,  H03F1/0216 ,  H03F1/0227 ,  H03F1/32 ,  H03F3/185 ,  H03F3/2173 ,  H03F3/2178 ,  H03F2200/03 ,  H03F2200/153 ,  H03F2200/432 ,  H04R3/12

Abstract: A method may include controlling switches of a switching full-bridge of a signal processing system to commutate polarity of a capacitor with respect to the first processing path output and a second processing path output of the signal processing system in response to a condition for commutating connectivity of the switching full-bridge and inserting a feedforward compensation that bypasses a loop filter of the second processing path in order to prevent discontinuities caused by commutating polarity of the capacitor from being compensated by the loop filter.

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：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.

公开(公告)号：US20220196503A1

公开(公告)日：2022-06-23

申请号：US17128676

申请日：2020-12-21

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Eric LINDEMANN ,  Pablo PESO PARADA ,  Tanner ROSENTHAL ,  Siddharth MARU

IPC: G01L25/00 ,  G06F3/041

Abstract: A baseline unit for use in a sensor system, the sensor system comprising N force sensors which output N sensor signals, respectively, where N≥1, the baseline unit configured to: monitor a measure of a rate of change of a sensor test signal, the sensor test signal being one of said N sensor signals or a signal derived from one or more of said N sensor signals; and in dependence upon the measure of the rate of change, control a stored baseline setting to control how a baseline test signal is calculated from said N sensor signals using a baseline-calculation method, the baseline-calculation method configured by the currently-stored baseline setting.

公开(公告)号：US20220155900A1

公开(公告)日：2022-05-19

申请号：US17097384

申请日：2020-11-13

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Josh SANZ-ROBINSON ,  Siddharth MARU ,  Tejasvi DAS

IPC: G06F3/041 ,  G06F3/02

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.

公开(公告)号：US20210357062A1

公开(公告)日：2021-11-18

申请号：US17370479

申请日：2021-07-08

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Gregory C. YANCEY ,  Michael KOST ,  Tejasvi DAS ,  Siddharth MARU ,  Matthew BEARDSWORTH ,  Vadim KONRADI

IPC: G06F3/041 ,  G01R27/02 ,  G01R27/26 ,  G06F1/16

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.

公开(公告)号：US20210124444A1

公开(公告)日：2021-04-29

申请号：US17142484

申请日：2021-01-06

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Siddharth MARU ,  Tejasvi DAS ,  Luke LAPOINTE ,  Srdjan MARIJANOVIC ,  Zhong YOU ,  Drew KINNEY ,  Anthony S. DOY ,  Eric J. KING

IPC: G06F3/044 ,  G06F3/041 ,  G06F3/045 ,  G01D5/243 ,  G01D5/20

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.