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:
Feb. 14, 2023
Filed:
Jun. 30, 2020
Applicant:
Fuji Electric Co., Ltd., Kanagawa, JP;
Inventor:
Kazumi Takagiwa, Matsumoto, JP;
Assignee:
FUJI ELECTRIC CO., LTD., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 17/0812 (2006.01); H03K 17/567 (2006.01); H03K 5/24 (2006.01); G01R 19/165 (2006.01); H02M 1/32 (2007.01); G01R 1/20 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H03K 17/08128 (2013.01); G01R 1/203 (2013.01); G01R 19/16528 (2013.01); H02M 1/32 (2013.01); H03K 5/24 (2013.01); H03K 17/567 (2013.01); H02M 1/0009 (2021.05); H02M 1/0025 (2021.05); H03K 2217/0027 (2013.01);
Abstract
There is provided a current detection circuit including: a current detection unit that detects a control current flowing between a control terminal of a semiconductor element of voltage-controlled type having a current detection terminal, and a drive circuit; an overcurrent detection unit that detects an overcurrent based on a result of comparing a sense voltage with a sense reference voltage, the sense voltage corresponding to a sense current flowing through the current detection terminal; and an adjustment unit that adjusts the sense reference voltage based on a detection result of the current detection unit.