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:
Nov. 24, 1981
Filed:
Apr. 18, 1979
Nippon Electric Co., Ltd., , JP;
Abstract
A semiconductor (preferably a thyristor) switch has characteristics that can be represented by an equivalent circuit including an interconnected pair of opposite conductive types of transistors. The base terminals of these transistors represent anode and cathode gate electrodes of the thyristors. An amplifier which is free from erroneous actions due to the impression of a transitional voltage is connected to an electrode of the thyristor, which corresponds to the base terminal of an equivalent transistor of a first conductive type, in order to supply a gate current. A resistor across the base-emitter junction of an equivalent transistor of a second conductive type has a sufficiently low-resistance value to satisfy a predetermined dv/dt-bearing capacity. Therefore, a sustaining gate current is provided responsive to an amplification of the input to the amplifying means.