Patent ID: 8354797
Filing Date: 2013-01-15
Classification: H05B

Abstract:
1. A circuit arrangement for operating a series circuit of at least one first and at least one second low-pressure gas-discharge lamp, the circuit arrangement comprising: an input with a first input connection and a second input connection for application of a supply AC voltage; an output with at least one first connection arrangement, which has a first connection pair and a second connection pair for connection of the first low-pressure gas-discharge lamp, and a second connection arrangement, which has a first connection pair and a second connection pair for connection of the second low-pressure gas-discharge lamp, wherein a first connection of the second connection pair of the first connection arrangement is coupled to a first connection of the first connection pair of the second connection arrangement; a resonant circuit having a resonant inductor, which is coupled between the first input connection and a first connection of the first connection pair of the first connection arrangement, and having a resonant capacitor, which is coupled between the first connection pair of the first connection arrangement and the second connection pair of the second connection arrangement; and a capacitive voltage divider, which has a first capacitor, which is coupled in parallel with the first connection arrangement, and a second capacitor, which is coupled in parallel with the second connection arrangement, wherein an additional winding is wound on the resonant inductor and is coupled to a second connection of the second connection pair of the first connection arrangement, and to a second connection of the first connection pair of the second connection arrangement.