公开(公告)号：US12160151B2

公开(公告)日：2024-12-03

申请号：US17512896

申请日：2021-10-28

Applicant: Richtek Technology Corporation

Inventor： Tsung-Han Yang ,  Yen-Chih Wang ,  Ming-Jun Hsiao ,  Tsung-Nan Wu

IPC: H02P25/034 ,  H02K33/04 ,  H02P6/00 ,  H02P25/06

Abstract: An electronic device for controlling an LRA (Linear Resonant Actuator) includes a signal generator, a driver, a delay unit, a sensor, and a DSP (Digital Signal Processor). The signal generator generates a digital signal. The driver drives the LRA according to the digital signal. The delay unit delays the digital signal for a predetermined time, so as to generate an estimated voltage signal. The sensor detects the current flowing through the LRA, so as to generate a sensing current signal. The DSP controls the resonant frequency or the gain value of the signal generator according to the estimated voltage signal and the sensing current signal.