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:
Feb. 02, 2010
Filed:
Jul. 13, 2007
Yoshihiro Nagaya, Kasugai, JP;
Takashi Matsumoto, Kasugai, JP;
Yoshihiro Nagaya, Kasugai, JP;
Takashi Matsumoto, Kasugai, JP;
Fujitsu Microelectronics Limited, Tokyo, JP;
Abstract
To present a DC-DC converter efficient in conversion and not requiring an external diode. The DC-DC converter includes a main NMOS transistor FETas a main switching device, a driver DVHfor driving a gate terminal of the main NMOS transistor FET, a capacitor Cconnected between a source terminal of the main NMOS transistor FETand a power source terminal of the driver DVH, and an NMOS transistor FETconnected between a route leading to an input power source and the power source terminal of the driver DVH. The NMOS transistor FETdoes not conduct when the main NMOS transistor FETconducts, and conducts when the main NMOS transistor FETdoes not conduct.