公开(公告)号：US20220408181A1

公开(公告)日：2022-12-22

申请号：US17572769

申请日：2022-01-11

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jon D. HENDRIX ,  Emmanuel A. MARCHAIS ,  Nicholas JOSEPH ,  Bryant TRAN ,  Marco A. JANKO ,  Noel PREECS

IPC: H04R3/00 ,  G06F3/01 ,  H03F1/56

Abstract: In accordance with embodiments of the present disclosure, a method of driving a playback waveform to an electromagnetic actuator by a transducer driving system may include operating the transducer driving system in a first mode wherein the electromagnetic actuator is driven with the playback waveform in a closed loop to form a closed-loop voltage drive system that includes a negative impedance, operating the transducer driving system in a second mode wherein the electromechanical actuator is driven with the playback waveform in an open loop, and operating a mode switch for transitioning the transducer driving system to operate between the first mode and the second mode.