Electric lamp and discharge devices: systems – Surge generator or inductance in the supply circuit
Patent
1987-12-01
1991-10-22
Razavi, Michael
Electric lamp and discharge devices: systems
Surge generator or inductance in the supply circuit
315224, 315244, 315307, 315DIG7, 315DIG5, H05B 3702
Patent
active
050598694
ABSTRACT:
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 on the current pulses and with a modulation ratio beween 0.3 and 1. The high-frequency is an integral multiple of the pulse recurrence frequency. Thus, flickering of the lamps is avoided.
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patent: 4724360 (1988-02-01), Luursema
Albach Manfred
Stormberg Hans-Peter
Wegener Armin F.
Franzblau Bernard
Razavi Michael
U.S. Philips Corporation
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