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：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.