Circuit arrangement for the operation of high-pressure gas...

H - Electricity – 05 – B

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H05B 41/24 (2006.01) H05B 41/30 (2006.01) H05B 41/392 (2006.01)

Patent

CA 1334681

In a circuit arrangement for the operation of high- pressure gas discharge lamps by means of a pulsatory supply current having a pulse recurrence frequency between 50 and 2000 Hz and a duty cycle between 0.2 and 0.8, a current having a high-frequency between 20 and 200 kHz is superimposed with a modulation ratio between 0.3 and 1 on the current pulses, the high-frequency being an integral multiple of the pulse recurrence frequency. Thus, flickering of the lamps is avoided. Figure 3

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