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. 08, 2000
Filed:
Apr. 06, 1998
Applicant:
Inventor:
Tomohisa Wada, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
327540 ; 327172 ; 327175 ; 327538 ; 323283 ;
Abstract
A high voltage generation circuit includes an inductor, a PN diode, a capacitor and a transistor. A high voltage sampling/division circuit, a control register, a voltage comparator, a counter, a pulse generation circuit and a ring oscillator in the high voltage generation circuit detect whether voltage generated through the capacitor is a desired high voltage or not and generates a pulse signal which controls ON/OFF of the transistor. Accordingly, a path of current flowing into the capacitor is changed and the generated voltage is digitally adjusted.