This paper introduces a new circuit using the zero voltage switched (ZVS) technology for simmering Xe Lamp.The firing voltage and the simmering current are supplied by different circuit separately.The resonant courses and the conditions to achieve ZVS are analyzed.The switched loss is reduced because of using ZVS.The resonant frequency can reach 100 kHz and the size of power is decreased consequently.The compact circuit can be used in simmering all kinds of Xe Lamps that have different size and air pressure by adjusting the parameters.The circuit can also be used in He Ne power.