公开(公告)号：US20230160696A1

公开(公告)日：2023-05-25

申请号：US17986598

申请日：2022-11-14

Applicant: InvenSense, Inc.

Inventor： Vito Avantaggiati ,  Carlo Pinna ,  Federico Mazzarella

IPC: G01C19/5649 ,  G01C19/5656 ,  G01C25/00

CPC classification number: G01C19/5649 ,  G01C19/5656 ,  G01C25/00

Abstract: An algorithm and architecture for sense transfer function estimation injects one or more test signals from a signal generator into a MEMS gyroscope to detect an output signal (e.g., proof mass output sense signal), including an in-phase (e.g., Coriolis) component and a quadrature component. The in-phase and quadrature components are encoded with reference signals to determine phase and/or gain variation and are processed via a variety of components (e.g., matrix rotation, digital gain, tones demodulator, transfer function errors estimation, etc.) to estimate a sense transfer function of the MEMS (e.g., Hs(fd)) and corresponding phase and/or gain offset of Hs(fd). The in-phase and quadrature components are also compensated for phase and/or gain offset by system components.