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:
Jan. 06, 2004
Filed:
Aug. 13, 2001
Applicant:
Inventors:
Kenji Naito, Kyoto-fu, JP;
Hisashi Takiguchi, Kyoto-fu, JP;
Masaru Omura, Kyoto-fu, JP;
Tadao Nagai, Kyoto-fu, JP;
Masahiko Kitamoto, Kyoto-fu, JP;
Tsuyoshi Umemoto, Kyoto-fu, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 2/724 ;
U.S. Cl.
CPC ...
H01F 2/724 ;
Abstract
The number of layers of a secondary winding of a flyback transformer for use in a PWM controlled high-tension voltage generator is increased to six or higher. The distributed capacitance of the flyback transformer is thus decreased, the frequency of ringing is increased, and the pulse width of a flyback pulse is narrowed. The timing of the on-operation of a control FET is expedited, and the input current to the flyback transformer is lowered. A compact and power-saving flyback transformer thus results.