| 摘要 |
A circuit arrangement for igniting and operating a high-pressure discharge lamp, provided with switching means, inductive means, and rectifying means together forming a Buck converter connected to input terminals for connection to a supply source and output terminals for connection of the means comprising the lamp so as to supply the lamp with a current through periodic switching of the switching means alternately into a conducting and a non-conducting state, the Buck converter operating in a self-oscillatory mode during stable lamp operation. According to the invention, the circuit arrangement is provided with means for causing the Buck converter to operate in a forced oscillatory mode in dependence on the lamp condition.
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