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. 07, 2001
Filed:
Aug. 05, 1999
Applicant:
Inventors:
Kimihiro Hoshi, Tokyo, JP;
Takeo Kanai, Saitama-ken, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 1/704 ;
U.S. Cl.
CPC ...
H03K 1/704 ;
Abstract
In a gate circuit having a turn-off gate circuit composed of: OFF gate power source E,of which one terminal is connected to the emitter of semiconductor switching element 81, and switch SW,that connects the other terminal of OFF gate power source E,and the gate of semiconductor switching element S,via resistor R,, the gate circuit is provided with second switch SW,that connects the other terminal of OFF gate power source E,and the gate of semiconductor switching element S,By closing second switch SW,at the timing at which the turn-off operation is completed, it will connect to OFF gate power source E,without passing through a resistor.