公开(公告)号：US20220316969A1

公开(公告)日：2022-10-06

申请号：US17218322

申请日：2021-03-31

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Tom BIRCHALL ,  Hamid SEPEHR ,  Colin CAMPBELL ,  Jason KULPE ,  Chin YONG ,  Pablo PESO PARADA

IPC: G01L5/16

Abstract: A method of recording measurement data for characterizing a response of a given type of device to an applied force, the given type defining devices of that type as comprising a defined arrangement of a surface and N force sensors of the device concerned, where N≥1, each force sensor configured to output a sensor signal, wherein in the defined arrangement the N force sensors are operatively coupled to a defined input region of the surface so as to sense a force applied to that input region, the method comprising: for a specimen device of the given type, performing at least one measurement procedure, each measurement procedure comprising at least one measurement operation, each measurement operation comprising applying a defined force at a corresponding location on the input region of the device concerned and recording measurement data for that device and location based on the sensor signals of the N force sensors of that device. Also disclosed are a related computer-implemented method of generating a characterization definition for devices of the given type, a computer-implemented method of generating a configuration definition for devices of the given type for a given use case defined by a use-case definition, a method of configuring a candidate device of the given type for the given use case, and a method of assessing or calibrating a candidate device of the given type.

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.