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:
Apr. 04, 2006
Filed:
Jul. 22, 2004
Noritoshi Imamura, Miyagi, JP;
Noritoshi Imamura, Miyagi, JP;
Sony Corporation, , JP;
Abstract
The object of the present invention is to improve the power factor and at the same time to obtain a high efficient operation. It is constituted such that one terminal of a DC power supplyfrom which a pulsating flow is obtained is connected to a connection mid point of one terminal of a primary windingand the other terminal of an auxiliary windingwound in phase on a converter transformerby means of a series circuit of a choke coiland a first diodeone terminal of the auxiliary windingof the converter transformeris connected to the other terminal of the DC power supplythrough a first capacitorand at the same time the other terminal of the primary windingis connected to the other terminal of the DC power supplythrough a switching devicea secondary windingwound in counter phase with the primary windingfor the converter transformeris connected to a DC voltage output terminalthrough a rectifying circuitthe DC voltage output terminalis connected to an input side of a pulse width modulation control circuitand an output terminal of the pulse width modulation circuitis connected to a control electrode of the switching device