| 摘要 |
The invention relates to a circuit arrangement for igniting and operating a high-pressure discharge lamp, provided with a Buck converter connected to output terminals for lamp connection, capable of supplying the lamp through periodic switching of switching means which are held alternately in a conducting state for a period ton and in a non-conducting state for a period toff. According to the invention, the circuit arrangement comprises means for a fixed limitation of the time duration toff.
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