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. 19, 1978
Filed:
Jun. 14, 1976
Applicant:
Inventors:
Shinzi Okuhara, Fujisawa, JP;
Ichiro Ohhinata, Yokohama, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
3072 / ; 307305 ; 3232 / ; 323 24 ;
Abstract
A semiconductor switch has a pair of PNPN switches connected in an inverse-parallel mode and each includes a switching circuit for protection against the rate effect. Each switch has its gate terminal multi-connected through a capacitive element to provide a terminal, which is connected to the output terminal of a control circuit for generating a voltage pulse in a repetitive manner to bear the difference of potential between the PNPN switches and a capacitive element by means of the capacitive element and to drive the PNPN switches with the aid of a variation of voltage produced in the control circuit.