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. 24, 2011
Filed:
Sep. 25, 2007
Morihito Hasegawa, Kasugai, JP;
Hidekiyo Ozawa, Kasugai, JP;
Morihito Hasegawa, Kasugai, JP;
Hidekiyo Ozawa, Kasugai, JP;
Fujitsu Semiconductor Limited, Yokohama, JP;
Abstract
The control circuit comprises: a detecting portion COMPfor detecting a status transition of a first signal FR at the connecting point P which changes at a constant cycle corresponding to current flowing through the antiparallel diode D when the main switch device FET is turned OFF; and a phase difference adjusting portionfor adjusting the phase difference by adjusting the output timing of the second signal FP corresponding to a phase difference between the phase of the first signal FR detected by the detecting portion COMPand the phase of the second signal FP generated based on the first signal of one cycle before and the rectification switch device FETis turned ON corresponding to the second signal FP whose output timing is adjusted by the phase difference adjusting portion