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:
Jul. 28, 2009
Filed:
Oct. 04, 2006
Toshitaka Shiga, Niiza, JP;
Ryuichi Furukoshi, Niiza, JP;
Toshitaka Shiga, Niiza, JP;
Ryuichi Furukoshi, Niiza, JP;
Sanken Electric Co., Ltd., Saitama, JP;
Abstract
A power converter is provided which comprises two main MOS-FETsconnected in series to a DC power source; an oscillatorwhich has two capacitorsconnected in parallel to main MOS-FETs; a primary windingof a transformerconnected between a junction of two main MOS-FETsand a junction of two capacitors; an electricity controllerwhich comprises first and second regulatory MOS-FETsconnected between respectively one and the other ends of a secondary windingof transformerand a speaker; a polarity detectorfor detecting the polarity of AC voltage produced on secondary windingof transformerby the on and off operation of MOS-FETsto generate detection signals; and a drive circuitfor receiving detection signals from polarity detectorto control the on and off operation of first and second regulatory MOS-FETsto simplify the circuit configuration and improve power conversion efficiency in the power converter.