Patent ID: 7110267

Claim:
An electronic circuit for igniting a high-pressure lamp, comprising resonant circuit ( 13 ) for providing an ignition voltage for the high-pressure lamp; a converter ( 12 ) for generating an alternating voltage with which the resonant circuit ( 13 ) is excited; an oscillator ( 14 , 16 , 17 ) for driving the converter ( 12 ), the fundamental frequency of the output voltage of the oscillator ( 14 , 16 , 17 ) lying at least in proximity to an integral fraction of the resonance frequency of the resonant circuit ( 13 ), and a feedback ( 17 ) from the resonant circuit ( 13 ) to the oscillator ( 14 , 16 , 17 ), whereby the fundamental frequency of the output voltage of the oscillator ( 14 , 16 , 17 ) is so tuned that the resulting frequency of the output voltage of the oscillator ( 14 , 16 , 17 ) corresponds substantially exactly to the integral fraction of the resonance frequency in proximity to which the fundamental frequency of the output voltage of the oscillator ( 14 , 16 , 17 ) lies.