Circuit arrangement for starting and operating gas discharge lam

Details Circuit arrangement for starting and operating gas discharge lam Circuit arrangement for starting and operating gas discharge lam

1986-08-25

1991-02-19

Razavi, Michael

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Flashers

315291, 315DIG4, 315DIG7, 315241R, H05B 3700

Patent

active

049947168

ABSTRACT:
A circuit arrangement for starting and operating gas discharge lamps with current of higher frequency comprises an electronic ballast unit connected to a direct voltage input source (2). An electronic switching element (3), which is controlled by a control device (8), is connected in series with an inductive element (4), and the discharge lamp (5). The lamp current flows through the inductive element from which a voltage is derived which is supplied to the control device as a supply direct voltage supply via a rectifier (14) and a smoothing capacitor (16). A first connection terminal of the smoothing capacitor is connected through a first ohmic resistor (18) to a first terminal of the direct voltage input source and a second connection of the capacitor is connected through the lamp (5) to a second terminal of the direct voltage input source.

REFERENCES:
patent: 3878429 (1975-04-01), Iwata
patent: 3896333 (1975-07-01), Nakamura
patent: 4194143 (1980-03-01), Farkas et al.
patent: 4316124 (1982-02-01), Verwimp et al.
patent: 4447759 (1984-05-01), Moerkens et al.
patent: 4520295 (1985-05-01), Bolhuis
patent: 4539513 (1985-09-01), Ganser et al.
patent: 4663569 (1987-05-01), Alley et al.

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