Control device for a fluorescent tube, having synchronized block

Details Control device for a fluorescent tube, having synchronized block Control device for a fluorescent tube, having synchronized block

1995-04-06

1997-02-18

Pascal, Robert

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

315307, 315DIG7, H05B 3702

Patent

active

056044089

ABSTRACT:
In a device to control a fluorescent tube supplied from a DC source by an accumulating converter, a rectifying bridge 17 is mounted opposite to the secondary 13, between the preheating electrodes 2, 3 of the tube, and supplies an auxiliary transistor 16. An energizing synchronizer 14 supplied by the rectifying bridge 17 receives at one input 24 the control signal of the primary transistor 5 from the modulator 4, and controls the blocking of the auxiliary transistor 16 in synchronism with the blocking of the primary transistor 5.

REFERENCES:
patent: 4368409 (1983-01-01), Sivanesan et al.

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