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:
Oct. 05, 2010
Filed:
Feb. 14, 2008
Applicant:
Kohsuke Inoue, Tokyo, JP;
Inventor:
Kohsuke Inoue, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 5/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor device includes a constant voltage circuit configured to convert an input voltage to a predetermined voltage by controlling an output transistor, and an overheat protection circuit configured to restrict output current of the constant voltage circuit according to temperature of the semiconductor device. The overheat protection circuit includes a diode to detect the temperature of the semiconductor device and a resistor connected in series with the diode.