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:
Aug. 15, 2006
Filed:
Mar. 11, 2005
Akira Haraguchi, Kasugai, JP;
Takashi Matsumoto, Kasugai, JP;
Akira Haraguchi, Kasugai, JP;
Takashi Matsumoto, Kasugai, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A constant-voltage power supply circuit includes a constant-voltage output unit and an output current restriction unit. The constant-voltage output unit includes an output transistor and controls the transistor based on output voltage from the output transistor to maintain the output voltage constant. The output current restriction unit restricts output current of the constant-voltage output unit. When the overcurrent detection unit detects that current flowing through the output transistor that is an overcurrent flowing continuously for a predetermined time, the output current restriction unit executes an output current restriction operation. This configuration prevents the output voltage from decreasing after an overcurrent control operation.