公开(公告)号：US20200343871A1

公开(公告)日：2020-10-29

申请号：US16928444

申请日：2020-07-14

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Johann G. GABORIAU ,  David M. OLIVENBAUM ,  Xiaofan FEI ,  Amar VELLANKI ,  Venugopal CHOUKINISHI ,  Gautham SIVASANKAR ,  Wai-Shun SHUM

IPC: H03G3/30 ,  H03F3/217

Abstract: A method for calibrating gain in a multi-path subsystem having a first processing path, a second processing path, and a mixed signal return path, may include low-pass filtering an input signal and a mixed signal return path signal generated from the input signal at subsonic frequencies to generate a filtered input signal and a filtered mixed signal return path signal and tracking and correcting for a gain difference between the first processing path and the second processing path based on the filtered input signal and the filtered mixed signal return path signal.