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. 01, 2008
Filed:
Nov. 10, 2004
Applicant:
Junichi Matsuoka, Tokyo, JP;
Inventor:
Junichi Matsuoka, Tokyo, JP;
Assignee:
NEC Microwave Tube, Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 41/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
Control of an output pulse width by a PWM control circuit is stopped and the initial pulse string having a fixed pulse width is outputted in order to obtain a power supply voltage rise within a predetermined time period at the time of turning on the power. During normal operation, the voltage detected by a voltage detecting circuit is captured by a PWM control circuit, and the pulse width of the output pulse string is adjusted according to the detected voltage in order to keep the power supply voltage constant.