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. 18, 2000
Filed:
Jul. 30, 1998
Applicant:
Inventor:
Seiya Kitagawa, Kanagawa, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323244 ; 323901 ;
Abstract
A DC-DC convertor is used as a power source for an electronic apparatus. In this converter, a synchronous rectification transistor is provided in parallel with a flywheel diode. A control circuit of the converter is configured in such a way that a synchronous rectification transistor isolating unit for compulsorily turning off the synchronous rectification transistor for a predetermined fixed period of time, at the activation time of the DC--DC convertor, is included.