公开(公告)号：US20190296674A1

公开(公告)日：2019-09-26

申请号：US16207340

申请日：2018-12-03

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Marco JANKO ,  Harsha RAO ,  Carl STÅHL ,  Rong HU

IPC: H02P25/034 ,  H02P21/00 ,  H02P21/13 ,  H02P21/18 ,  H02P21/22 ,  H03H17/02 ,  G08B6/00

Abstract: According to embodiments described herein, there is provided methods and apparatus for providing a driving signal to a transducer, wherein the driving signal is output by an amplifier. A method comprises receiving an indication of a voltage and a current of the driving signal; based on an electrical model of the transducer and the voltage and the current of the driving signal, estimating an estimated electrical response of the transducer representative of movement of a mass in the transducer; comparing the estimated electrical response to a desired electrical response; and controlling the driving signal based on the comparison.