Patent ID: 6998793

Claim:
An inverter for providing AC voltages having two different frequencies to a lamp circuit, the inverter comprising: a first switch for passing a DC voltage; a first oscillating circuit coupled to the first switch for receiving the DC voltage and generating a first AC voltage having a first frequency; a second oscillating circuit coupled to the first switch for receiving the DC voltage and generating a second AC voltage having a second frequency; a second switch coupled between a power supply and the first switch for passing the first DC voltage or a second DC voltage provided by the power supply to the first switch as the DC voltage; and a transformer coupled to the first oscillating circuit and the second oscillator for transforming the first AC voltage provided by the first oscillating circuit or the second AC voltage provided by the second oscillator into a third AC voltage and passing the third AC voltage to the lamp circuit; wherein the first switch selectively passes the DC voltage to the first oscillating circuit or the second oscillating circuit.