20110115398 | STARTING DEVICE WITH TWO INPUT POLES - In order to reduce the amount of wiring complexity involved in conventional starting devices for gas discharge lamps, the invention proposes a starting circuit arrangement in which the lamp, in order to provide an AC supply voltage (UN), is assigned a supply circuit, which has at least one inductor, which is arranged in series with the gas discharge lamp, and wherein the starting circuit arrangement comprises: a starting transformer, which is connected on the primary side to a starting triggering circuit and can be connected on the secondary side to the lamp for the transmission of a starting pulse; an input energy source for the starting triggering circuit; a first switch means in the starting triggering circuit; an electronic control device which drives the first switch means. The starting circuit arrangement according to the invention is characterized by the fact that it has, on the supply side, an input terminal which can be connected in the supply circuit of the lamp between the inductor and the lamp, and a means is provided for reproducing the phase profile of an AC supply variable of the lamp after starting of the lamp, in particular in order to determine a zero crossing of the AC supply variable of the lamp after starting of the lamp. The invention also relates to a method for operating a starting circuit arrangement. | 05-19-2011 |