公开(公告)号：US11139767B2

公开(公告)日：2021-10-05

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: B66C1/10 ,  H02P25/034 ,  H02P21/00 ,  H02P21/13 ,  H02P21/22 ,  H03H17/02 ,  G08B6/00 ,  H02P21/18 ,  G06F3/01 ,  B06B1/02

Abstract: According to embodiments described herein, there are 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.

公开(公告)号：US11121661B2

公开(公告)日：2021-09-14

申请号：US16702929

申请日：2019-12-04

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Marco Janko ,  Emmanuel Marchais ,  Carl Ståhl

IPC: H02P25/034 ,  G08B6/00

Abstract: A method for minimizing settling of a moving mass of an electromagnetic load may include determining a polarity and a magnitude of a velocity of the moving mass based on real time measurements of one or more parameters associated with the electromagnetic load and based on the polarity and the magnitude of the velocity, generating a braking signal to be applied to the moving mass that opposes the polarity of the velocity.