公开(公告)号：WO2022271472A1

公开(公告)日：2022-12-29

申请号：PCT/US2022/033190

申请日：2022-06-13

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  TAIPALE, Dana J.

Inventor： HENDRIX, Jon D. ,  MARCHAIS, Emmanuel A.

IPC: B06B1/02 ,  G10K9/13 ,  H03F1/32 ,  B06B1/0215 ,  G06F3/016 ,  H03F1/3247 ,  H03F2200/03 ,  H03F3/181 ,  H03F3/187 ,  H03F3/2175 ,  H03G3/3005

Abstract: A method may include receiving, by a transducer driving system, a first signal for driving an amplifier that drives an electromagnetic load and receiving, by the transducer driving system, a second signal driven by the amplifier in order to control a feedback loop of the transducer driving system. The method may also include detecting unexpected spectral content in the second signal, declaring an indicator event based on the detected unexpected spectral content, determining whether the indicator event occurs in an undesired pattern, and in response to the indicator event occurring in the undesired pattern, modifying a behavior of the transducer driving system.

公开(公告)号：WO2022211958A1

公开(公告)日：2022-10-06

申请号：PCT/US2022/018475

申请日：2022-03-02

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  DAS, Tejasvi

Inventor： MARU, Siddharth ,  MELANSON, John L.

IPC: G01D18/00 ,  G01D5/243 ,  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.

公开(公告)号：WO2022026181A1

公开(公告)日：2022-02-03

申请号：PCT/US2021/041544

申请日：2021-07-14

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  MACKAY, Graeme G.

Inventor： SHARMA, Ajit ,  LAWRENCE, Jason W.

IPC: H02M3/156 ,  H02J7/00

Abstract: A power delivery system may include a power converter configured to electrically couple to a power source and further configured to supply electrical energy to one or more loads electrically coupled to an output of the power converter and control circuitry comprising a feedback loop configured to monitor a voltage derived from the power source and control a limit for a current supplied from the power source to the one or more loads based on the voltage derived from the power source.

公开(公告)号：WO2021236329A1

公开(公告)日：2021-11-25

申请号：PCT/US2021/030932

申请日：2021-05-05

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  LAWRENCE, Jason W.

Inventor： KING, Eric J. ,  MACKAY, Graeme G.

IPC: H02M1/00 ,  H02M1/15 ,  H02M1/44 ,  H02M3/156 ,  H02M3/158

Abstract: A system for controlling a current in a power converter configured to generate an output voltage may include a control loop having a plurality of comparators, each comparator having a respective reference voltage to which the output voltage is compared, a digital controller configured to calculate one or more pre-seeded control parameters for the current, and an analog state machine configured to, based on outputs of the plurality of comparators, select control parameters for controlling the current. The control parameters may be selected from the pre-seeded control parameters, control parameters for controlling the current to have a magnitude of zero, and control parameters for controlling the current to have a maximum magnitude.

公开(公告)号：WO2021081160A1

公开(公告)日：2021-04-29

申请号：PCT/US2020/056782

申请日：2020-10-22

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  KING, Eric J.

Inventor： MELANSON, John L. ,  MACKAY, Graeme G. ,  ZHANG, Lingli

IPC: H02J7/00 ,  H02M1/00 ,  H02M3/00 ,  H02M3/158

Abstract: A battery management system configured to electrically couple to a battery may include a boost converter comprising a plurality of switches arranged to provide a boosted output voltage at an output of the boost converter from a source voltage of the battery and a bypass switch coupled between the battery and the output, wherein the battery management system is operable in a plurality of modes comprising a bypass mode wherein the source voltage is bypassed to the output and when the battery management system is in the bypass mode, at least one switch of the plurality of switches is enabled to increase a conductance between the battery and the output.

公开(公告)号：WO2020256996A1

公开(公告)日：2020-12-24

申请号：PCT/US2020/036756

申请日：2020-06-09

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  JANKO, Marco

Inventor： JANKO, Marco ,  MARCHAIS, Emmanuel ,  STÅHL, Carl

IPC: B06B1/02 ,  G06F3/01

Abstract: A method for minimizing settling of a moving mass of an electromagnetic load may include determining a polarity and a magnitude of a velocity of the moving mass based on real time measurements of one or more parameters associated with the electromagnetic load and based on the polarity and the magnitude of the velocity, generating a braking signal to be applied to the moving mass that opposes the polarity of the velocity.

公开(公告)号：WO2020247202A1

公开(公告)日：2020-12-10

申请号：PCT/US2020/034520

申请日：2020-05-26

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  BEARDSWORTH, Matthew

Inventor： BEARDSWORTH, Matthew ,  DAS, Tejasvi ,  MARU, Siddharth ,  LAPOINTE, Luke

IPC: G01D3/036 ,  G01D18/00 ,  H03K17/965 ,  G01D5/20

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.

公开(公告)号：WO2019203887A1

公开(公告)日：2019-10-24

申请号：PCT/US2018/054413

申请日：2018-10-04

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  DAS, Tejasvi

Inventor： DAS, Tejasvi ,  MORTON, Alan Mark ,  ZHAO, Xin ,  ZHU, Lei ,  FEI, Xiaofan ,  GABORIAU, Johann G. ,  MELANSON, John L. ,  VELLANKI, Amar

IPC: H03F3/183 ,  H03F3/217

Abstract: A system may include a digital pulse width modulator subsystem, a first path coupled to an output of the digital pulse width modulator subsystem, a second path coupled to the output of the digital pulse width modulator subsystem and configured to drive a closed-loop analog pulse width modulator, a controller to select between the first path and the second path for processing a signal based on one or more characteristics of the signal, wherein a first gain of the first path and a second gain of the second path are approximately equal at the time of switching selection between the first path and the second path or vice versa, in order to minimize artifacts due to the switching.

公开(公告)号：WO2019190785A1

公开(公告)日：2019-10-03

申请号：PCT/US2019/022578

申请日：2019-03-15

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  MARJIANOVIC, Srdjan

Inventor： MARJIANOVIC, Srdjan ,  KINNEY, Drew ,  LAPOINTE, Luke ,  MARU, Siddharth ,  DAS, Tejasvi ,  DOY, Anthony S. ,  YOU, Zhong

IPC: G01D5/20

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.

公开(公告)号：WO2019079035A1

公开(公告)日：2019-04-25

申请号：PCT/US2018/054186

申请日：2018-10-03

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  DAS, Tejasvi

Inventor： DAS, Tejasvi ,  MORTON, Alan Mark ,  ZHAO, Xin ,  ZHU, Lei ,  FEI, Xiaofan ,  GABORIAU, Johann G. ,  MELANSON, John L. ,  VELLANKI, Amar

IPC: H03F3/183 ,  H03F3/217

Abstract: A system may include a digital pulse width modulator subsystem, a first path coupled to an output of the digital pulse width modulator subsystem and configured to drive an open-loop driver stage, a second path coupled to the output of the digital pulse width modulator subsystem and configured to drive a closed-loop analog pulse width modulator, a controller to select between the first path and the second path for processing a signal based on one or more characteristics of the signal, and a calibration subsystem configured to calibrate at least one of a first gain of the first path and a second gain of the second path in order that the first gain and the second gain are at least approximately equal at the time of switching selection between the first path and the second path or vice versa, in order to minimize artifacts due to the switching.