H - Electricity – 05 – B
Patent
H - Electricity
05
B
355/47, 315/59
H05B 31/30 (2006.01) H05B 41/04 (2006.01) H05B 41/392 (2006.01)
Patent
CA 1149077
PHD.79-063 1 18.3.80 "ABSTRACT": "Circuit arrangement for starting and operating a gas- and/or vapour discharge lamp". In a circuit arrangement for starting and operating a discharge lamp by means of an electronic ballast a series arrangement of a PTC-resistor and an ohmic resistor is connected in parallel with an electronic switch of the ballast, only the PTC resistor being in parallel with a control circuit of the elec- tronic switch. The value of the ohmic resistor is 8 to 12 times the cold resistance of the PTC resistor.
353457
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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