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:
Jan. 29, 1982
Applicant:
Inventor:
Helmut Herberg, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 38 ; 357 234 ; 357 43 ; 357 64 ; 357 86 ;
Abstract
A thyristor has a pair of opposite conductivity bases between and respectively adjacent to opposite conductivity emitters. An auxiliary emitter serves for internal current gain and is provided with an auxiliary emitter cathode. In order to meet the mutually-contradictory requirements for great stability against unintentional trigger operations and a high trigger sensitivity, the auxiliary emitter electrode is connected by way of a semiconductor switch to the base layer adjacent the auxiliary emitter for increasing the trigger sensitivity. The thyristor may be employed in situations in which a high di/dt stability and a high dU/dt stability is desired.