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:
Feb. 18, 2003
Filed:
Sep. 29, 2000
Applicant:
Inventor:
Fumihiro Sasaki, Gunma-ken, JP;
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F 1/656 ;
U.S. Cl.
CPC ...
G05F 1/656 ;
Abstract
A transistor ( ) is switched on or off to thereby cause a counter electromotive force on a coil ( ) so that a high voltage is charged to a capacitor ( ) via a zener diode ( ). As a breakdown current of the zener diode ( ) flows to the ground via the transistor ( ), a voltage lower than a predetermined voltage is applied to the transistor ( ). In addition, as the breakdown current of the zener diode ( ) does not flow directly to the ground, variance of a boosted voltage can be prevented.