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:
Feb. 26, 1985
Filed:
Feb. 04, 1982
Helmut Herberg, Munich, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
A thyristor has an n-emitter provided with a cathode, a p-emitter provided with an anode, and two base layers respectively adjacent thereto. Further, an auxiliary emitter serves the purpose of internal current gain. High ignition sensitivity is strived for in addition to good stability. To this end, a connectible auxiliary emitter is provided next to the auxiliary emitter, forming a three-layer structure together with the base layers with a higher current transfer ratio for the charge carriers emitted by it than the auxiliary emitter. In order to produce a high ignition sensitivity, the connectible auxiliary emitter is conductively connected to the auxiliary emitter via a semiconductor switch. The area of employment comprises trigger-sensitive thyristors with high di/dt and dU/dt stability.