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:
Oct. 20, 2020
Filed:
Aug. 29, 2018
Stmicroelectronics S.r.l., Agrate Brianza, IT;
Alessandro Tocchio, Milan, IT;
Francesco Rizzini, Cornaredo, IT;
Carlo Valzasina, Gessate, IT;
Giacomo Langfelder, Milan, IT;
Cristiano Rocco Marra, Milan, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
An inertial sensor for sensing an external acceleration includes: a first and a second proof mass; a first and a second capacitor formed between first and second fixed electrodes and the first proof mass; a third and a fourth capacitor formed between third and fourth fixed electrodes and the second proof mass; a driving assembly configured to cause an antiphase oscillation of the first and second proof masses; a biasing circuit configured to bias the first and third capacitors, thus generating first variation of the oscillation frequency in a first time interval, and to bias the second and fourth capacitors, thus generating first variation of the oscillation frequency in a second time interval; a sensing assembly, configured to generate an differential output signal which is a function of a difference between a value of the oscillating frequency during the first time interval and a value of the oscillating frequency during the second time interval. Such differential output signal can be correlated to the value and direction of the external acceleration.