Patent ID: 7002819

Claim:
A half-bridge inverter, controlled by a square wave for converting a direct current power supply into an alternate current power for the use of at least one lamp, comprising: a transformer, having a primary winding, a secondary winding and an auxiliary winding; an external-driven switch, being coupled to said primary winding and ground and controlled by said square control signal; a self-driven switch, being coupled to said primary winding, said auxiliary winding and said direct current power supply and controlled by an output voltage of said auxiliary winding; and a resonant capacitor, being coupled to said secondary winding; wherein said square signal controls a switching of said external-driven switch and said output voltage of said auxiliary winding controls a switching of said self-driven switch introducing said direct current power supply into said primary winding of said transformer, while an alternating voltage is sensed by said secondary winding of said transformers senses and converted into alternate current power by said resonant capacitor.