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:
May. 08, 2001
Filed:
Nov. 13, 1998
Applicant:
Inventor:
Toshiharu Okamoto, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F 1/10 ;
U.S. Cl.
CPC ...
G05F 1/10 ;
Abstract
In a negative voltage generating circuit, a reference voltage generating circuit generates a first reference voltage. A voltage dividing circuit divides a voltage between the first reference voltage and a negative voltage to produce a division voltage. A comparing circuit compares a second reference voltage and the division voltage. A negative voltage generating section generates the negative voltage based on the comparing result by the comparing circuit to supply to the voltage dividing circuit. A potential corresponding to the division voltage is equal to the ground potential when the negative voltage is equal to a desired value.