Switching device having varying RC time period for ignition of a lamp

摘要

The invention relates to a switching device for operating a lamp by means of a high-frequency current, which switching device comprises a DC-AC converter whose oscillation frequency is determined by a timer circuit comprising a resistor and a capacitor. In accordance with the invention, the timer circuit also comprises a chain C which includes a switching element and which is used to increase the RC period of the timer circuit during ignition of the lamp, thereby increasing the amplitude of the voltage across the lamp.