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：US20240395120A1

公开(公告)日：2024-11-28

申请号：US18793115

申请日：2024-08-02

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Anil LAL ,  Michael KUREK ,  Hamid SEPEHR

IPC: G08B6/00

Abstract: A haptics signal generator configured to generate a haptics signal for driving a haptics transducer by amplitude modulating and frequency modulating a carrier signal based on an input audio signal.

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：US20230059333A1

公开(公告)日：2023-02-23

申请号：US17542571

申请日：2021-12-06

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Anil LAL ,  Michael KUREK ,  Hamid SEPEHR

IPC: G08B6/00

Abstract: A haptics signal generator configured to generate a haptics signal for driving a haptics transducer by amplitude modulating and frequency modulating a carrier signal based on an input audio signal.

公开(公告)号：US20180224325A1

公开(公告)日：2018-08-09

申请号：US15888275

申请日：2018-02-05

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Anil LAL

IPC: G01H9/00

CPC classification number: G01H9/008 ,  G01S7/5276 ,  G01S15/526 ,  G06F16/00

Abstract: An ultrasonic motion activity detector is configured to, in each of a series of frames: obtain an ultrasonic signal derived from a transmitted ultrasonic signal; derive an activity signal based on a difference between the obtained signal in a present frame and at least one previous frame; determine a peak value of the activity signal in a first time window of the frame; determine a peak value of the activity signal in a second time window of the frame, wherein the first time window is different from the second time window; calculate a ratio of the peak value of the activity signal in the first time window of the frame to the peak value of the activity signal in the second time window of the frame; and compare the calculated ratio with a threshold value, and, in frames in which the calculated ratio exceeds the threshold value, determine that there is motion of an object relative to the detector.