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：US20170133000A1

公开(公告)日：2017-05-11

申请号：US15337223

申请日：2016-10-28

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jon D. HENDRIX ,  Jeffrey D. ALDERSON ,  Chin Huang YONG ,  Ryan A. HELLMAN

IPC: G10K11/178

CPC classification number: G10K11/17833 ,  G10K11/17881 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3056 ,  G10K2210/506 ,  H04R1/1083 ,  H04R3/005 ,  H04R2410/05 ,  H04R2460/01

Abstract: An integrated circuit may include an output for providing an output signal to a transducer including both a source audio signal for playback to a listener and an anti-noise signal for countering the effect of ambient audio sounds in an acoustic output of the transducer, an ambient microphone input for receiving an ambient microphone signal indicative of the ambient audio sounds; an error microphone input for receiving an error microphone signal indicative of the output of the transducer and the ambient audio sounds at the transducer; and a processing circuit that implements a feedback path having a feedback response that generates a feedback anti-noise signal from the error microphone signal, wherein a signal gain of the feedback path is a function of the ambient microphone signal, and wherein the anti-noise signal comprises at least the feedback anti-noise signal.