| 摘要 |
The invention relates to a circuit arrangement for igniting and operating at least two discharge lamps, provided with input terminals (K1,K2) for connection to a supply voltage source, means I (SC, S1, S2) coupled to the input terminals for generating a high-frequency voltage from a supply voltage delivered by the supply voltage source, a load branch B coupled to the means I and comprising a first branch A comprising first terminals (K3,K3') for accommodating a discharge lamp and a first inductive element L1, a second branch C shunting the first branch A and comprising further terminals (K4,K4') for accommodating a discharge lamp and a second inductive element L2 which is magnetically coupled to the first inductive element L1, and means II for limiting the voltage across branch A and branch C to a first value during the ignition of the discharge lamps. According to the invention, the circuit arrangement is in addition provided with means III for limting the voltage across branch A and branch C to a second value after the ignition of one of the discharge lamps. The occurrence of ignition voltages of very high amplitude across the discharge lamp igniting last is prevented thereby. <IMAGE>
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