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. 14, 2025
Filed:
Oct. 26, 2021
Applicant:
Tdk Corporation, Tokyo, JP;
Inventor:
Akinori Hariya, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 1/00 (2007.01); G01R 15/18 (2006.01); H02M 3/335 (2006.01);
U.S. Cl.
CPC ...
H02M 1/0009 (2021.05); G01R 15/183 (2013.01); H02M 3/33584 (2013.01);
Abstract
A current detection circuit can minutely adjust characteristics when currents flowing in two directions in a current transformer are detected. The current detection circuit is configured to detect a value of a switching current through a detection resistor using a current transformer, and the value of the switching current is detected by switching the detection resistor and a reset resistor on the basis of a flow direction of the switching current flowing on a primary side of the current transformer.