公开(公告)号：US11933822B2

公开(公告)日：2024-03-19

申请号：US17574188

申请日：2022-01-12

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jorge L. Reynaga ,  Marco A. Janko ,  Emmanuel A. Marchais ,  John L. Melanson

IPC: G01R19/00 ,  G01R27/02 ,  G08B6/00 ,  H02P29/00

CPC classification number: G01R19/0046 ,  G01R27/02 ,  G08B6/00 ,  H02P29/00

Abstract: A method for estimating actuator parameters for an actuator, in-situ and in real-time, may include driving the actuator with a test signal imperceptible to a user of a device comprising the actuator during real-time operation of the device, measuring a voltage and a current associated with the actuator and caused by the test signal, determining one or more parameters of the actuator based on the voltage and the current, determining an actuator type of the actuator based on the one or more parameters, and controlling a playback signal to the actuator based on the actuator type.

公开(公告)号：US20250024197A1

公开(公告)日：2025-01-16

申请号：US18353092

申请日：2023-07-16

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Emmanuel A. Marchais ,  Ziyan Zou ,  Chin Huang Yong

IPC: H04R3/00 ,  H04R29/00

Abstract: The impedance of a connector, such as a flex cable, between a source and load affects the temperature and power consumption within an electronic system, such as a mobile device. According to embodiments described in this disclosure, the impedance of the flex cable may be separately tracked from the impedance of the source, which provides for improved power management within the electronic system. The impedance of the flex cable may be factored into determining a maximum available power to the load. The impedance of the flex cable may also be mapped to a temperature and used to manage power to maintain operation within temperature limits. Additional aspects of power management and impedance tracking for a connector are described herein.

公开(公告)号：US11908310B2

公开(公告)日：2024-02-20

申请号：US17549399

申请日：2021-12-13

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Dana J. Taipale ,  Jon D. Hendrix ,  Emmanuel A. Marchais

IPC: G08B6/00

CPC classification number: G08B6/00

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：US12100978B2

公开(公告)日：2024-09-24

申请号：US17466478

申请日：2021-09-03

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Emmanuel A. Marchais ,  James M. Nohrden ,  John L. Melanson

IPC: H02J7/00

CPC classification number: H02J7/0024 ,  H02J7/0019 ,  H02J2310/22

Abstract: A two-cell battery management system may include a switching network comprising a plurality of switches configured to electrically couple two battery cells to one another and a first load configured to receive electrical energy from the two battery cells and control circuitry configured to dynamically control the switching network among a plurality of switching configurations comprising a first switching configuration in which the first load is in parallel with both of the two battery cells, a second switching configuration in which the first load is in parallel with a first battery cell of the two battery cells and is electrically isolated from a second battery cell of the two battery cells, and a third switching configuration in which the first load is in parallel with the second battery cell and is electrically isolated from the first battery cell.

公开(公告)号：US11948739B2

公开(公告)日：2024-04-02

申请号：US17568248

申请日：2022-01-04

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Emmanuel A. Marchais ,  Tejasvi Das ,  Siddharth Maru

IPC: H01F7/18

CPC classification number: H01F7/1844 ,  H01F2007/185

Abstract: A system may include an electromagnetic actuator, a first coil configured to drive mechanical displacement of the electromagnetic actuator, a second coil configured to drive mechanical displacement of the electromagnetic actuator, and an inductance sensing subsystem having an inductance sensing path coupled to the first coil and the second coil. The inductance sensing subsystem may be configured to select one of the first coil and the second coil for driving mechanical displacement of the electromagnetic actuator, select the other of the first coil and the second coil as a sensing coil for sensing displacement of the electromagnetic actuator, determine a displacement of the electromagnetic actuator based on a measurement of estimated inductance of the sensing coil, and when switching selection of the sensing coil from the first coil to the second coil determine the displacement of the first coil based on a measured inductance of the first coil at approximately the time of switching selection, estimate state variables of the inductance sensing path to be used with the second coil based on the displacement, and apply the state variables to the inductance sensing path after switching selection of the sensing coil from the first coil to the second coil.

公开(公告)号：US12159528B2

公开(公告)日：2024-12-03

申请号：US18080900

申请日：2022-12-14

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Marco A. Janko ,  Filippo Rossi ,  Hamid Sepehr ,  Kyle Wilkinson ,  Emmanuel A. Marchais ,  Vadim Konradi ,  Anil Lal ,  Aleksey S. Khenkin ,  Chin Huang Yong

IPC: G08B6/00

Abstract: A method for determining and mitigating over-excursion of an internal mass of an electromechanical transducer may include measuring a sensed signal associated with the electromechanical transducer in response to a driving signal driven to the electromechanical transducer, determining a non-linearity value based on the sensed signal, mapping the non-linearity value to a probability of over-excursion of the internal mass, and applying a gain to a signal path configured to generate the driving signal based on the probability.

公开(公告)号：US11765499B2

公开(公告)日：2023-09-19

申请号：US17572769

申请日：2022-01-11

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jon D. Hendrix ,  Emmanuel A. Marchais ,  Nicholas Joseph ,  Bryant Tran ,  Marco A. Janko ,  Noel Preecs

IPC: H04R3/00 ,  G06F3/01 ,  H03F1/56

CPC classification number: H04R3/00 ,  G06F3/016 ,  H03F1/56 ,  H03F2200/03 ,  H03F2200/471

Abstract: In accordance with embodiments of the present disclosure, a method of driving a playback waveform to an electromagnetic actuator by a transducer driving system may include operating the transducer driving system in a first mode wherein the electromagnetic actuator is driven with the playback waveform in a closed loop to form a closed-loop voltage drive system that includes a negative impedance, operating the transducer driving system in a second mode wherein the electromechanical actuator is driven with the playback waveform in an open loop, and operating a mode switch for transitioning the transducer driving system to operate between the first mode and the second mode.