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:
Jun. 17, 2003
Filed:
Mar. 04, 2002
Kraisorn Throngnumchai, Yokohama, JP;
Hiroyuki Kaneko, Yokohama, JP;
Yoshio Shimoida, Yokosuka, JP;
Toshirou Karaki, Yokosuka, JP;
Nissan Motor Co., Ltd., Kanagawa, JP;
Abstract
There are included a switching circuit for flowing pulse electrical current through a primary winding of a transformer, a half wave rectification circuit or a full wave rectification circuit for extracting electrical current from a secondary winding of the transformer while this pulse electrical current flows, and an electrical current regulation circuit which controls the magnitude of the electrical current which is extracted from the secondary winding of the transformer according to the collector voltage of the power transistor. Since the most suitable pulse electrical current is made directly from the direct current power supply and is supplied to the base of the power transistor, there is no requirement to provide any DC-DC converter, and it is possible to reduce the size and the cost of the power supply circuit for driving the power transistor.