公开(公告)号：US20250056156A1

公开(公告)日：2025-02-13

申请号：US18795418

申请日：2024-08-06

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Peter FOSKEY ,  Kurt EFAW ,  Brad ZWERNEMANN ,  Enrique PEREZ BENAVIDES ,  Andrew RUMELT ,  Christopher JACKSON ,  Marco A. JANKO ,  William E. SHERWOOD ,  James E. BARKULOO

IPC: H04R3/04 ,  G10K11/175 ,  G10L25/18

Abstract: A computer having a system for mitigating mechanical rattle arising due to a mechanical coupling of an audio output transducer to a part of the computer device, the system comprising: a processing subsystem configured to receive an input audio signal and to output a drive signal for driving the audio output transducer to produce a transducer output, wherein the processing subsystem is configured to selectively apply an attenuation function to the input audio signal to attenuate a signal component of the input audio signal at a frequency that causes mechanical rattle in the computer; and an analyser subsystem configured to receive the input audio signal and to output a control signal to the processing subsystem to control application of the attenuation function to the input audio signal by the processing subsystem based on a spectral content of the received input audio signal; wherein the attenuation function is based on characteristic acoustic behaviour of the computer.

公开(公告)号：US20230245537A1

公开(公告)日：2023-08-03

申请号：US18095305

申请日：2023-01-10

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Anil LAL ,  Hamid SEPEHR ,  Aleksey S. KHENKIN ,  Filippo ROSSI ,  Vadim KONRADI ,  Marco A. JANKO ,  Chin H. YONG ,  Colin CAMPBELL

IPC: G08B6/00

CPC classification number: G08B6/00

Abstract: A method for determining and mitigating over-excursion of an internal mass of an under-damped electromechanical transducer may include transforming an electrical playback signal to an estimated displacement signal, based on the estimated displacement signal, determining an estimated over-excursion of the internal mass responsive to the electrical playback signal, and limiting, based on the estimated over-excursion, an electrical driving signal derived from the electrical playback signal and for driving the electromechanical transducer in order to mitigate over-excursion of the internal mass.

公开(公告)号：US20220029505A1

公开(公告)日：2022-01-27

申请号：US17497110

申请日：2021-10-08

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Aleksey KHENKIN ,  Siddharth MARU ,  Tejasvi DAS ,  Emmanuel MARCHAIS ,  Vadim KONRADI ,  Viral PARIKH ,  Jon D. HENDRIX ,  Marco A. JANKO

IPC: H02K7/065 ,  G01D5/243 ,  H02K41/03 ,  G06F3/01 ,  G01R27/26

Abstract: A system for detecting displacement of a movable member of an electromagnetic transducer having a magnetic coil-driven linear actuator with a static member and a movable mass mechanically coupled to the static member and having a back electromotive force present across terminals of a coil of the electromagnetic transducer is provided. The system may include a resistive-inductive-capacitive sensor comprising the coil, a driver configured to drive the resistive-inductive-capacitive sensor with a driving signal, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to measure one or more of phase information and amplitude information associated with the resistive-inductive-capacitive sensor and based on the one or more of phase information and amplitude information, determine a displacement of movable mass, wherein the displacement of the movable mass causes a change in an impedance of the resistive-inductive-capacitive sensor.

公开(公告)号：US20240114288A1

公开(公告)日：2024-04-04

申请号：US18073853

申请日：2022-12-02

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Ning LI ,  Hamid SEPEHR ,  Ben LESLIE ,  Aleksey KHENKIN ,  Michael KUREK ,  Marco A. JANKO ,  Vadim KONRADI ,  Peter FOSKEY ,  Aaron TREPTOW

IPC: H04R3/00 ,  H04R9/02 ,  H04R29/00

CPC classification number: H04R3/007 ,  H04R9/022 ,  H04R29/001 ,  H04R2400/03

Abstract: A method of controlling a vibrational transducer, the method comprising: tracking a temperature metric of the vibrational transducer; and controlling a drive signal for the vibrational transducer, where the drive signal is limited to a value to protect the vibrational transducer from over excursion, and where said value is a function of the tracked temperature metric.

公开(公告)号：US20230237886A1

公开(公告)日：2023-07-27

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

CPC classification number: 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：US20220408181A1

公开(公告)日：2022-12-22

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

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.

公开(公告)号：US20220404398A1

公开(公告)日：2022-12-22

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 ,  G08B6/00 ,  G01R27/02 ,  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.