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:
Nov. 17, 2015
Filed:
Nov. 16, 2012
Applicant:
Fujitsu Semiconductor Limited, Yokohama-shi, JP;
Inventors:
Assignee:
SOCIONEXT INC., Yokohama-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/10 (2006.01); G05F 1/56 (2006.01); G05F 3/24 (2006.01);
U.S. Cl.
CPC ...
G05F 1/10 (2013.01); G05F 1/56 (2013.01); G05F 3/247 (2013.01);
Abstract
In a constant voltage circuit including: an error amplifier circuit amplifying a difference voltage between an output voltage and a reference voltage; and an output transistor controlling the output voltage based on an output of the error amplifier circuit, a voltage proportional to a leakage current detected by a monitoring transistor is generated by an oscillation circuit and a charge pump circuit and is supplied to a back gate of the output transistor.