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. 11, 2020
Filed:
Dec. 19, 2018
Applicant:
Fdk Corporation, Tokyo, JP;
Inventors:
Miyabi Ishikawa, Tokyo, JP;
Norio Fukui, Tokyo, JP;
Assignee:
FDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 19/165 (2006.01); H03K 17/082 (2006.01); G01R 27/08 (2006.01); H02M 3/158 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
G01R 19/16547 (2013.01); G01R 27/08 (2013.01); H02M 3/158 (2013.01); H03K 17/0822 (2013.01); H02M 3/1582 (2013.01); H02M 2001/0009 (2013.01); H03K 2217/0027 (2013.01);
Abstract
A detection circuit detects a current value obtained from a mathematically processed signal to be inputted in a former half period of bisected halves of an ON period of a switching element when step-down operation is performed. Moreover, the detection circuit detects a current value obtained from a mathematically processed signal to be inputted in a latter half period of bisected halves of an ON period of a switching element when step-up operation is performed.