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:
Dec. 27, 1988
Filed:
Jun. 24, 1985
Applicant:
Inventors:
Yoshitaka Sugawara, Hitachi, JP;
Junjiro Kitano, Fujisawa, JP;
Tadakatsu Kimura, Ebina, JP;
Yasunobu Inabe, Atugi, JP;
Masa-aki Tanabe, Kodaira, JP;
Assignees:
Hitachi Ltd., Tokyo, JP;
Nippon Telegraph & Telephone, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 38 ; 357 39 ; 357 43 ; 357 234 ; 357 2312 ;
Abstract
A semiconductor switch circuit of field-drive type includes a bipolar component having forward blocking and reverse blocking junctions, and p-channel and n-channel IGPETS connected across the bipolar component so as to short-circuit its forward blocking junction. The switch circuit operates to turn on or off in response to the voltage signal to the gate circuit which is isolated from the bipolar component, irrespective of the polarity of a voltage applied across the bipolar component.