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:
Apr. 09, 2013
Filed:
Mar. 29, 2011
Applicants:
Akihiro Shinoda, Niiza, JP;
Masato Hara, Niiza, JP;
Inventors:
Akihiro Shinoda, Niiza, JP;
Masato Hara, Niiza, JP;
Assignee:
Sanken Electric Co., Ltd., Niiza-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A switching device has a main IGFET having a Schottky barrier diode Dfor blocking an inverse current built therein, a protective switch means, and a protective switch control means. The protective switch means is connected in between a drain electrode D and a gate electrode G of the main IGFET. The protective switch control means turns on the protective switch means when an inverse voltage is impressed to the main IGFET. Thereby, the main IGFET is protected from the inverse voltage.