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:
May. 03, 2005
Filed:
Sep. 16, 2003
Masakazu Takagi, Tokyo, JP;
Junichi Yamamoto, Tokyo, JP;
Katsuhiko Shimizu, Tokyo, JP;
Toshiyuki Zaitsu, Tokyo, JP;
Masakazu Takagi, Tokyo, JP;
Junichi Yamamoto, Tokyo, JP;
Katsuhiko Shimizu, Tokyo, JP;
Toshiyuki Zaitsu, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A switching power supply unit of the present invention a timing generating circuit () which receives a first control signal formed by a rectifier-transistor driving circuit (), forms a second control signal based on the first control signal, and supplies the second control signal to a control electrode of the rectifier transistor (). The first control signal is synchronized with the switching operation of a half-bridge circuit (), and the second control signal exceeds a threshold voltage of a rectifier transistor () at a timing substantially equal to the timing that one edge of the first control signal is generated and falls below the threshold voltage of the rectifier transistor () at a timing earlier by predetermined time than the timing that the other edge of the first control signal is generated.