US 11,841,229 B2
Driving circuit, method for driving a MEMS gyroscope and a corresponding MEMS gyroscope
Stefano Facchinetti, Caponago (IT)
Assigned to STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed by STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed on Feb. 18, 2021, as Appl. No. 17/179,225.
Application 17/179,225 is a continuation of application No. 16/123,849, filed on Sep. 6, 2018, granted, now 10,955,244.
Claims priority of application No. 102017000103058 (IT), filed on Sep. 14, 2017.
Prior Publication US 2021/0172738 A1, Jun. 10, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G01C 19/5776 (2012.01); G01C 19/5712 (2012.01)
CPC G01C 19/5776 (2013.01) [G01C 19/5712 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A driving circuit, comprising:
a measurement stage configured to:
receive a signal representative of a movement of a microelectromechanical system (MEMS) mobile mass; and
determine an oscillation amplitude of the movement of the MEMS mobile mass based on a number of periods of a clock signal that are in a duration of a time interval in which an amplitude of the signal satisfies an amplitude criterion; and
a control stage configured to generate at least one drive signal for the MEMS mobile mass based on the oscillation amplitude, and output the at least one drive signal for driving the MEMS mobile mass at an oscillation frequency.