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. 16, 1997
Filed:
Apr. 25, 1996
Hiroshi Kumano, Kyoto, JP;
Kazufumi Mimoto, Kyoto, JP;
Eiichi Sakao, Kyoto, JP;
Fumiaki Shigeoka, Kitakyushu, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
In a semiconductor protection circuit, a current fuse and a transistor are connected in series between a power supply terminal and a ground. A bias circuit is provided between the base and the emitter of the transistor. The bias circuit applies between the base and the emitter of the transistor a constant bias voltage that is lower than a normal environment temperature forward voltage of a p-n junction between the transistor's base and emitter. When a load connected to the other terminal of the current fuse is overheated, the forward voltage of the p-n junction drops, and the transistor is turned on.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile