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:
Jun. 09, 2020
Filed:
Mar. 09, 2017
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Kiminori Nakajima, Minowa-machi, JP;
Katsuhiko Maki, Chino, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 25/00 (2006.01); H03L 7/099 (2006.01); H03L 7/083 (2006.01); G01C 19/5776 (2012.01);
U.S. Cl.
CPC ...
G01C 25/00 (2013.01); G01C 19/5776 (2013.01); H03L 7/083 (2013.01); H03L 7/099 (2013.01);
Abstract
A circuit device includes a driving circuit that generates a clock signal by oscillating a vibrator, a master clock signal generation circuit that generates a master clock signal, and a master clock signal failure detection circuit that detects a failure of the master clock signal. The master clock signal failure detection circuit detects the failure of the master clock signal on the basis of an error detection clock signal, which is the clock signal from the driving circuit, and the master clock signal.