Patent · US Expired

Circuit arrangement for drive of a thyristor with light

US4578595A · kind A · utility

2Cited by

6References

8Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Jeno Tihanyi · Tauberbischofsheim, DE
Christine Fellinger · Unterhaching, DE
Ludwig Leipold · Munich, DE

Key dates

Filing date	Oct 24, 1984
Grant date	Mar 25, 1986
Priority date	—
Expiry date	Oct 24, 2004

Classification

Technology area (CPC H)Electricity
CPC primaryH10F39/103
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A circuit arrangement for drive of a thyristor with light comprises a zero pause control which permits an ignition of a thyristor only in a proximity of a zero point of the thyristor voltage. The control contains an IGFET which transports away a base current of the phototransistor effecting ignition when the thyristor voltage exceeds a specific value. The gate terminal of the IGFET connects to an alternating voltage via a photodiode. The zero point control can only be activated when the photodiode is illuminated.

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