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. 19, 1993
Filed:
Jun. 12, 1991
Applicant:
Inventor:
Hitoshi Kokubun, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06G / ; H03K / ;
U.S. Cl.
CPC ...
307350 ; 307355 ; 307362 ; 307491 ; 307494 ; 307530 ;
Abstract
A voltage measuring circuit for detecting an unknown voltage in a semiconductor integrated circuit or the like. A voltage to be measured is converted into a first current by a current converting transistor, and a difference between the first current and a reference current is converted into a voltage. As a result, the voltage measuring circuit can be arranged without using a floating node, whereby it is possible to prevent variations in a desired voltage value to be measured.