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. 24, 2020
Filed:
Nov. 26, 2019
Applicant:
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
Inventors:
Akihiro Nishigaki, Sakai, JP;
Koichiro Fujita, Sakai, JP;
Kenichi Tanaka, Sakai, JP;
Tsuyoshi Nakahira, Kobe, JP;
Assignee:
SHARP KABUSHIKI KAISHA, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 1/00 (2006.01); H03K 3/00 (2006.01); H03K 17/16 (2006.01); H03K 4/08 (2006.01); H03K 3/84 (2006.01);
U.S. Cl.
CPC ...
H03K 17/162 (2013.01); H03K 3/84 (2013.01); H03K 4/08 (2013.01);
Abstract
A switching control circuit that controls on/off of a switching element is provided to efficiently disperse EMI noise due to high-speed switching, the switching control circuit includes a gate driver, a variable capacitance element connected to a gate of the switching element, and a capacitance changing circuit that randomly changes a capacitance of the variable capacitance element.