Electronic ballast circuit

Electric lamp and discharge devices: systems – Plural power supplies – Discharge device and/or rectifier in one of the supply circuits

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Details

315173, 315205, 315240, 315241R, H05B 3700

Patent

active

045008124

ABSTRACT:
An electronic ballast circuit for a lower pressure lamp wherein a voltage divider network coupled by a capacitor and directly coupled to an AC source is shunted by a series connected transistor switch and capacitor filter, and the switch is coupled by a diode to a lamp while a ballast resistor couples the filter capacitor to the lamp. A starter network device includes a glo-bottle starter which couples a transistor switch to the lamp with a resistor coupled to the glo-bottle starter and the transistor switch.

REFERENCES:
patent: 3670230 (1972-06-01), Rooney
patent: 3787751 (1974-01-01), Farrow
patent: 4042856 (1977-08-01), Steigerwald
patent: 4109307 (1978-08-01), Knoll

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