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:
Oct. 15, 2002
Filed:
Sep. 27, 2000
Tamiji Nagai, Kanagawa, JP;
Yoshisada Okayasu, Tokyo, JP;
Akio Nakamura, Kanagawa, JP;
Tsutomu Suda, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A power source unit is constructed by an AC/DC switching power source circuit , a battery unit , switching circuits and , detecting circuits and corresponding to the switching circuits and , and stop signal forming circuits and . In the supplying mode, the power source circuit is made operative, the switching circuit is turned on, an output voltage formed by the power source circuit is supplied to the load side, and at the same time, the switching circuit is turned off by a stop output from the stop signal forming circuit . In the charging mode, the power source circuit is made operative, the switching circuit is turned on, the output voltage formed by the power source circuit is supplied to the battery unit , and at the same time, the switching circuit is turned off by a stop output of the stop signal forming circuit