公开(公告)号：US20230090794A1

公开(公告)日：2023-03-23

申请号：US17512896

申请日：2021-10-28

申请人： Richtek Technology Corporation

发明人： Tsung-Han YANG ,  Yen-Chih WANG ,  Ming-Jun HSIAO ,  Tsung-Nan WU

IPC分类号： H02K33/04 ,  H02P25/06 ,  H02P6/00

摘要： 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.