| 摘要 |
The invention relates to a circuit arrangement for operating a high-pressure discharge lamp (La), provided with first capacitive means C1, a commutator (S1-S4, D1'-D4') for generating a low-frequency alternating current through the high-pressure discharge lamp from a DC voltage present across the first capacitive means, which commutator comprises input terminals coupled to the first capacitive means, a load branch (L1, K1, K2) which comprises terminals for connection of the high-pressure discharge lamp and inductive means L1. According to the invention, the first capacitive means C1 are shunted by a branch K which comprises a series circuit of second capacitive means C2 and a unidirectional element D1 for blocking a current with which the second capacitive means C2 charge the first capacitive means C1. It is achieved thereby that the re-ignition voltage pulse which causes the lamp to re-ignite after a zero crossing of the low-frequency alternating current has a comparatively high amplitude, so that the lamp re-ignites in a reliable manner.
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