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. 28, 2003
Filed:
Jun. 26, 2002
Toshiyuki Yamagishi, Kounosu, JP;
Koichi Morita, Fujimi, JP;
Sanken Electric Co, Ltd., , JP;
Abstract
A power supply including a transformer having a primary winding connected to a pair of a.c. input terminals via a rectifier circuit, and a secondary winding connected to a pair of d.c. output terminals via a rectifying and smoothing circuit. Connected between the pair of outputs of the rectifier circuit via the transformer primary, a primary switch is turned on and off to keep the d.c. output voltage constant. Electromagnetically coupled together, two inductance coils are connected to the rectifier circuit for improvements in power factor and input waveform. An ancillary switch is connected in parallel with the serial connection of the transformer primary and the primary switch in order to provide a discharge circuit for a soft-switching capacitor connected in parallel with the primary switch. Switching loss is reduced by causing the soft-switching capacitor to discharge before the primary switch is turned on.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile