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. 20, 2005
Filed:
Nov. 30, 2004
Shinichiro Matsunaga, Matsumoto, JP;
Shinichiro Matsunaga, Matsumoto, JP;
Fuji Electric Holdings Co., Ltd., Kawasaki, JP;
Abstract
A bidirectional main switch includes two main switches Mand Mformed of two main MOSFET'S Qand Q, respectively; a bidirectional mirror switch including two mirror switches Mand Mformed of two mirror MOSFET'S Qand Q, respectively, both being formed so as to allow a small current (a mirror current) to flow therein in a specified ratio to a current in the main MOSFET'S Qand Q; and an operational amplifier Opforming feed back amplifying circuit having power supplied from two power sources. Thus, a bidirectional current flowing in the bidirectional main switch for cutting off an excessive charge current and an excessive discharge current of a battery E can be detected by a simple circuit with low power losses and a high accuracy.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile