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:
Sep. 27, 2022
Filed:
Feb. 22, 2019
Applicant:
Fuji Electric Co., Ltd., Kawasaki, JP;
Inventor:
Takahiro Mori, Matsumoto, JP;
Assignee:
FUJI ELECTRIC CO., LTD., Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01K 3/00 (2006.01); G01K 7/01 (2006.01); H03K 17/08 (2006.01);
U.S. Cl.
CPC ...
G01K 3/005 (2013.01); G01K 7/01 (2013.01); H03K 2017/0806 (2013.01);
Abstract
A temperature detection device includes a temperature detection diode, a comparator, and a forward current correction circuit. The comparator compares a forward voltage of the temperature detection diode with a threshold voltage and outputs a level signal corresponding to a temperature state. The forward current correction circuit includes a current mirror circuit including a first transistor and a second transistor, a third transistor, an operational amplifier and a variable resistor, and corrects a forward current of the temperature detection diode to change the forward voltage.