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:
Aug. 18, 2020
Filed:
Oct. 27, 2016
Seiko Epson Corporation, Tokyo, JP;
Denso Corporation, Kariya, Aichi, JP;
Kiminori Nakajima, Kamiina-gun, JP;
Naoki Yoshida, Kariya, JP;
Seiko Epson Corporation, , JP;
DENSO CORPORATION, , JP;
Abstract
A physical quantity detection apparatus includes a vibrator which outputs a detection signal in accordance with a physical quantity and a drive circuit which drives the vibrator to oscillate, wherein the drive circuit includes: an oscillation detecting unit which detects an oscillating state or a non-oscillating state of the vibrator based on a drive signal of the vibrator; a start-up oscillation unit which assists an oscillating operation of the vibrator when a detection result of the oscillation detecting unit represents the non-oscillating state; and a switching count monitoring unit which detects that the number of times switching is performed between the oscillating state and the non-oscillating state in the oscillation detecting unit has exceeded a set upper limit number of times.