Patent ID: 8067899
Filing Date: 2011-11-29
Classification: H05B

Abstract:
1. A circuit arrangement for operating at least one first and a second lamp, the first and the second lamp in each case having a first and a second coil electrode, comprising a first and a second terminal for the first coil electrode of the first lamp; a first and a second terminal for the second coil electrode of the first lamp; a first and a second terminal for the first coil electrode of the second lamp; a first and a second terminal for the second coil electrode of the second lamp; at least one supply terminal for supplying a supply voltage to the respective first coil electrode of the at least one first and/or second lamp; at least one preheating device for the respective first coil electrode of the at least one first and second lamp; the second terminal of the first coil electrode of the first lamp being coupled to the second terminal of the first coil electrode of the second lamp; wherein the preheating device comprises a first preheating inductance and a second preheating inductance which are arranged in series with one another, the coupling of the first and of the second preheating inductance being coupled to the coupling of the second terminal of the first coil electrode of the first lamp and of the second terminal of the first coil electrode of the second lamp.