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:
Nov. 05, 2019
Filed:
Oct. 25, 2017
Applicant:
Fuji Electric Co., Ltd., Kanagawa, JP;
Inventor:
Hirotoshi Kaneda, Matsumoto, JP;
Assignee:
FUJI ELECTRIC CO., LTD., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 17/0812 (2006.01); H03K 17/0814 (2006.01); H03K 17/30 (2006.01); H03K 17/16 (2006.01);
U.S. Cl.
CPC ...
H03K 17/08122 (2013.01); H03K 17/08142 (2013.01); H03K 17/166 (2013.01); H03K 17/302 (2013.01);
Abstract
A gate driving circuit is connected to a main switching element. The gate driving circuit includes a gate resistor. The gate resistor includes a voltage controlled resistor of which a resistance value is able to be continuously changed. A switching power supply device includes a gate driving circuit, a main switching element, and a freewheeling diode connected in reverse parallel to the main switching element.