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. 28, 1989
Filed:
Jul. 19, 1983
Eberhard Spenke, Pretzfeld, DE;
Michael Stoisiek, Ottobrunn, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A thyristor has a semiconductor member with a pnpn-layer sequence, a plurality of n(p)-emitter parts, and switching transistors arranged at the edges of the n(p)-emitter parts. The switching transistors respectively include a p(n) semiconductor zone inserted in one of the n(p)-emitter parts, a partial zone of the p(n)-base, and an intermediately disposed channel zone covered by an insulated gate. Rapid and effective reduction of the electron-hole plasma flooding the p-base and n-base during quenching of the thyristor is achieved by a current source connected between electrodes for the p(n) semiconductor zones and a cathode (anode) feed line, the current source delivering an extraction current pulse.