Circuit for operating gas discharge lamps with a periodically al

Details Circuit for operating gas discharge lamps with a periodically al Circuit for operating gas discharge lamps with a periodically al

1988-02-16

1989-12-19

Boudreau, Leo H.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Flashers

315224, 315227R, 315209R, 315244, H05B 3700

Patent

active

048885240

ABSTRACT:
A circuit arrangement for operating at least one gas discharge lamp (5) with a periodically varying lamp current and adapted for connection to an alternating voltage source with a period N. The circuit is provided with a controlled semiconductor switch (3) and a control circuit for switching the controlled semiconductor switch with a switching period S in dependence upon a comparison between an actual signal proportional to the lamp current and a nominal signal derived from a voltage across the switching transistor (3).

REFERENCES:
patent: 3265930 (1966-08-01), Powell
patent: 3801867 (1974-04-01), West et al.
patent: 3913002 (1975-10-01), Steigerwald
patent: 4042856 (1977-08-01), Steigerwald
patent: 4045709 (1977-08-01), Morais
patent: 4051411 (1977-09-01), Knoble et al.

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