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. 19, 2000
Filed:
Dec. 14, 1999
Applicant:
Inventor:
Yasuhiro Kobayashi, Nagano, JP;
Assignee:
Nagano Japan Radio Co., Ltd., Nagano, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
363 20 ; 363127 ;
Abstract
A switching power supply of a synchronous rectification type is provided. A transformer has at least a primary winding and a secondary winding. A main switching element switches input DC current via the primary winding. An auxiliary switching element is arranged on a side of the secondary winding for use in conducting commutation current. The auxiliary switching element is turned on after the main switching element is turned off. The main switching element is turned on immediately after release of exciting energy from the transformer is completed.