In order to achieve an accurate adjustment of the resonant frequency in the resonant circuit, it is proposed that the circuit further comprises: a converter 12 for generating an alternating voltage, by which the resonant circuit 13 is excited; and oscillators 14, 16, 17 for driving the transformation The fundamental frequency of the output voltage of the oscillator 12 is at least a fraction of the resonant frequency of the resonant circuit 13. Finally, it is proposed that the circuit include feedback 17 from the resonant circuit 13 to the oscillators 14, 16, 17 such that the fundamental frequency of the output voltage of the oscillator is tuned such that the resulting frequency of the output voltage of the oscillator substantially corresponds exactly to the resonance A fraction of the frequency. The invention also relates to a corresponding lighting device and corresponding method.
1
1
Xinshengyang Opto-Electronics Technology Co., Ltd. , http://www.junsunlight.com