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:
Jun. 15, 2004
Filed:
Nov. 14, 2002
Chongming Qiao, Irvine, CA (US);
Keyue M. Smedley, Irvine, CA (US);
Thomas A. Brooks, Carlsbad, CA (US);
Tetsuhiko Shimpo, Poway, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
A DC-to-DC converter is coupled to an AC source comprising a rectifier bridge. An input inductor is coupled to the output of the rectifier stage. An auxiliary winding is coupled to the input inductor. The auxiliary winding is characterized by a first number of turns. A storage capacitor is coupled to the auxiliary winding. An output transformer is coupled to the auxiliary winding. A first switch is coupled in series with the primary of the output transformer. The first switch and primary are coupled in parallel with the storage capacitor to the auxiliary winding. The number of turns of the auxiliary is less than the number of turns of the primary so that voltage across the storage capacitor is reduced without load carrying capacity of the DC-to-DC converter.