High-pressure sodium discharge lamp

Details High-pressure sodium discharge lamp High-pressure sodium discharge lamp

1989-01-24

1990-09-18

Pascal, Robert J.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Discharge control discharge device in the supply circuit

315291, 315307, 315DIG5, H05B 3702

Patent

active

049581066

ABSTRACT:
A circuit arrangement for operating a high-pressure sodium lamp is provided with two lamp connection points. The circuit arrangement comprises a controlled main switching element, a control electrode of which is connected to a control circuit. The circuit arrangement is provided with a measuring impedance in series with a lamp connection point and with a measuring impedance parallel to the lamp connection points. The measuring impedances are connected to the control circuit. A combination of a resistor and a capacitor is further connected to the control circuit and this combination is connected in series with one lamp connection point.

REFERENCES:
patent: 4370601 (1983-01-01), Horii et al.
patent: 4728865 (1988-03-01), Daniels

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