The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2025
Filed:
Apr. 04, 2022
Stmicroelectronics, Inc., Coppell, TX (US);
Stmicroelectronics S.r.l., Agrate Brianza, IT;
Yamu Hu, Allen, TX (US);
Naren K Sahoo, Frisco, TX (US);
Pavan Nallamothu, Little Elm, TX (US);
Deyou Fang, Frisco, TX (US);
David McClure, Carrollton, TX (US);
Marco Garbarino, Cusago, IT;
STMicroelectronics, Inc., Coppell, TX (US);
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
At start-up of a microelectromechanical system (MEMS) gyroscope, the drive signal is inhibited, and the phase, frequency and amplitude of any residual mechanical oscillation is sensed and processed to determine a process path for start-up. In the event that the sensed frequency of the residual mechanical oscillation is a spurious mode frequency and a quality factor of the residual mechanical oscillation is sufficient, an anti-phase signal is applied as the MEMS gyroscope drive signal in order to implement an active dampening of the residual mechanical oscillation. A kicking phase can then be performed to initiate oscillation. Also, in the event that the sensed frequency of the residual mechanical oscillation is a resonant mode frequency with sufficient drive energy, a quadrature phase signal with phase lock loop frequency control and amplitude controlled by the drive energy is applied as the MEMS gyroscope drive signal in order to induce controlled oscillation.