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:
Dec. 06, 2011
Filed:
Dec. 29, 2008
Wataru Nakahori, Tokyo, JP;
Wataru Nakahori, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A switching power supply unit is provided, which may supply stable output while manufacturing cost is held down. In a smoothing circuit, a magnetic flux in a first circular magnetic path, a magnetic flux in a second circular magnetic path, a magnetic flux generated by a current flowing through a choke coil, and a magnetic flux generated by a current flowing through another choke coil are shared by one another in the inside of a common magnetic core. A current flowing through two choke coils and a current flowing through different, two choke coils are balanced, and thus stabilized. Moreover, in the smoothing circuit, since such a balanced state is automatically kept, a characteristic value of an element or the like need not be adjusted.