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:
Sep. 23, 2003
Filed:
Jun. 03, 2002
Applicant:
Inventors:
Takeshi Kitaizumi, Toyonaka, JP;
Haruo Suenaga, Katano, JP;
Hideaki Moriya, Yamatokoriyama, JP;
Emiko Ishizaki, Nabari, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 6/68 ;
U.S. Cl.
CPC ...
H05B 6/68 ;
Abstract
Timing of zero voltage in zero-voltage detector for detecting zero voltage of a commercial power supply is predicted and input from the zero-voltage detector is received only for a given time before and after the predicted timing, whereby overvoltage and overcurrent caused by a zero point shift can be prevented. Thus, it is provided a magnetron drive power supply which is excellent in stability for change in the power supply environment such as noise or instantaneous power interruption.