Patent · US Expired

Semiconductor switch with thyristors

US4217504A · kind A · utility

6Cited by

3References

8Claims

0Family size

Assignee

Licentia Patent-Verwaltungs-GmbH · DE

Inventors

Marius Fullmann · Neu-Isenburg, DE
Friedhelm Sawitzki · Frankfurt am Main, DE
Dieter Silber · Eschborn, DE

Key dates

Filing date	Mar 9, 1978
Grant date	Aug 12, 1980
Priority date	—
Expiry date	Mar 9, 1998

Classification

Technology area (CPC H)Electricity
CPC primaryH03K17/73
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A semiconductor switch including a main thyristor and an auxiliary thyristor which can both be switched on and off by a control current. The anodes of the two thyristors are connected together and lead to a first load current terminal for the switch, the cathode of the main thyristor leads to a second load current terminal for the switch, the control electrode of the main thyristor is connected with the cathode of the auxiliary thyristor, and the control current for the switch is fed in via the control electrode of the auxiliary thyristor. The turn-off gain of the main thyristor is greater than the turn-off gain of the auxiliary thyristor and the holding current of the auxiliary thyristor is lower than the holding current of the main thyristor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.