Patent ID: 11867509
Assignee: INVENSENSE, INC.
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 20:
21. A method for operating a microelectromechanical system (MEMS) gyroscope, comprising:
driving at least one driven mass of a suspended spring-mass system along a first axis, wherein the driven mass comprises at least one driven mass sense electrode responsive to the driving of the driven mass along the first axis and a drive amplitude electrode extending along a second axis that is perpendicular to the first axis;
receiving a drive sense signal, wherein the drive sense signal is based on a capacitive engagement of the at least one driven mass sense electrode with a fixed driven mass sense electrode during the driving of the driven mass along the first axis;
receiving a drive amplitude signal, wherein the drive amplitude signal is based on an overlap of the drive amplitude electrode and a fixed drive amplitude sense electrode during the driving of the driven mass along the first axis;
monitoring a change in the received drive amplitude signal;
determining a drive reference signal based on the monitored change of the received drive amplitude signal; and
determining a drive motion of the driven mass based on the drive sense signal and the drive reference signal.