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:
Jul. 07, 2020
Filed:
Feb. 02, 2018
Applicant:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Inventor:
Jun-ichi Nagata, Kawasaki, JP;
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/3842 (2019.01); G01R 31/392 (2019.01); G01R 31/385 (2019.01); G01R 31/388 (2019.01); H02J 7/00 (2006.01);
U.S. Cl.
CPC ...
G01R 31/3842 (2019.01); G01R 31/386 (2019.01); G01R 31/392 (2019.01); H02J 7/0031 (2013.01); H02J 7/0047 (2013.01); G01R 31/388 (2019.01); H02J 7/0048 (2020.01);
Abstract
A remaining battery charge measuring circuit for measuring remaining charge of a battery, includes: an LC circuit including an inductance element and a capacitance element; and a switch element that controls coupling between the battery and the LC circuit, wherein the switch element disconnects the LC circuit from the battery, based on a resonant frequency by the LC circuit.