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:
Sep. 08, 2026
Filed:
Dec. 26, 2024
Seiko Epson Corporation, Tokyo, JP;
Tomohiro Uno, Chino, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A circuit apparatus includes: a first oscillation circuit configured to generate a first clock signal; a PLL circuit including a second oscillation circuit configured to generate a second clock signal and a frequency control voltage generation circuit configured to generate a frequency control voltage for controlling a frequency of the second clock signal, the PLL circuit being configured to synchronize a phase of the second clock signal with a phase of the first clock signal; and a failure detection circuit configured to monitor the frequency control voltage and detect whether there is a possibility that the frequency control voltage deviates from a predetermined voltage range in which the second oscillation circuit is capable of operating normally.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile