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. 13, 1977
Filed:
Sep. 03, 1976
Shinzi Okuhara, Fujisawa, JA;
Yoshikazu Hosokawa, Hitachi, JA;
Tatsuya Kamei, Hitachi, JA;
Masayoshi Suzuki, Hitachi, JA;
Hitachi, Ltd., , JA;
Abstract
A semiconductor switch assuring the easy formation of a semiconductor integrated circuit and having high control sensitivity while maintaining high dv/dt - immunity, which comprises a PNPN switch of an equivalently four-layered structure including at least three PN-junctions, an anode and a cathode, switching means including a control terminal and connected with the PNPN switch to shunt one of the three PN-junctions at either one end of the PNPN switch, amplifying means, and a capacitive element for differentiating a voltage applied between the anode and the cathode of the PNPN switch to allow a current to flow into the control terminal of the switching means through the amplifying means, so that the switching means is driven by the current thereby to short-circuit the one of three PN-junctions.