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:
Dec. 07, 2021
Filed:
Feb. 19, 2020
Seiko Epson Corporation, Tokyo, JP;
Sho Matsuzaki, Ina, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A real-time clock module includes a switch circuit that is electrically coupled to a first node to which a first power supply voltage is applied and a second node to which a second power supply voltage is applied and switches between outputting the first power supply voltage and outputting the second power supply voltage, a power supply detection circuit that detects a voltage value of the first power supply voltage, a switch control circuit that controls the switching of the switch circuit based on an output of the power supply detection circuit, a constant voltage circuit that outputs a constant voltage signal based on the output of the switch circuit, and a current control circuit that controls a current supplied to the constant voltage circuit, in which, when where the switch control circuit switches the switch circuit, the current control circuit increases the current supplied to the constant voltage circuit.