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:
Oct. 08, 2002
Filed:
Oct. 15, 2001
Nobutaka Uesono, Nagaoka, JP;
Abstract
A switching power supply which includes a sychronous rectifier circuit that performs sychronous rectification with a main switching element by using rectifying switching elements. When a current begins to flow into the rectifying switching element the rectifying switching element builds up rapidly by the voltage induced in the auxiliary winding of low impedance. Accordingly, the rectifying switching element turns on rapidly at a point showing an approximately maximum current so that the ON-state resistance of the rectifying switching element can be smaller. The voltage induced in the auxiliary winding is fed directly as a drive signal of the rectifying switching element so that the drive signal is not influenced by an output voltage.