US Patent 7342813 Half bridge inverter with dual N-MOS

A half bridge inverter with dual N-MOS includes a push/pull control chip outputting a first control signal with a duty cycle greater than 50% and a second control signal with a duty cycle greater than 50%. Moreover, both a first buffer circuit and a second buffer circuit are coupled to the push/pull control chip. A driver couples to the push/pull control chip through the first buffer circuit for receiving the first control signal, and couples to a DC power. A half bridge switch assembly with two N-MOSes couples to the DC power, the driver, the second buffer circuit and a transformer, and converts the DC power into an AC power by the driver. The AC power is transmitted to a first side of the transformer.