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. 17, 2006
Filed:
Aug. 10, 2005
Toshihiro Amei, Toyama, JP;
Toshihiro Amei, Toyama, JP;
SMK Corporation, Tokyo, JP;
Abstract
In a synchronous rectification switching power supply circuit, a primary winding of a transformer and a main switching device are serially connected to a direct current input power supply. A secondary winding and a synchronous rectification device on the secondary side are serially connected between output terminals. A power supply apparatus has a capacitor charged with a voltage across the winding on the secondary side of the transformer by turning the main switching device on and off. An electronic instrument, to which the power supply apparatus is connected, has a control IC which sends a control signal to the gate terminal of the synchronous rectification device. When the synchronous rectification device is turned on, the output capacitor is charged and the direct current input power supply recovers power from the output capacitor through the transformer, thereby supplying output electric power set by the control IC to the electronic instrument.