Patent ID: 9125282
Filing Date: 2015-09-01
Classification: H05B

Abstract:
1. A circuit arrangement for operating a discharge lamp comprising: a capacitive element which is connected in parallel with the discharge lamp and an inductive element which is in series upstream of the discharge lamp and the capacitive element, such that a resonant circuit is formed; a plurality of switches for applying current to the resonant circuit; means for closing each of the plurality of switches in a mutually alternating sequence at a switching frequency; means for measuring an amperage of a current flowing through one switch of the plurality of switches; means for establishing the switching frequency as a function of the measured amperage; control means for influencing the measured values obtained by the means for measuring, said control means including a source for providing a fixed potential across a switching point of thc circuit arrangement; and an application-specific integrated circuit operatively coupled to the plurality of switches, said application-specific integrated circuit including a plurality of potential outputs for respectively triggering each of the plurality of switches, a potential input of the means for measuring and a third potential output for providing the source.