Patent ID: 7746337

Claim:
An inverter circuit comprising: a first transformer having a primary winding to which a first control signal is applied; a second transformer having a primary winding to which a second control signal is applied; a power voltage circuit to generate a predetermined direct current voltage; a first field effect transistor electrically connected between the power voltage circuit and a driving node, the first field effect transistor having a gate connected to a secondary winding of the first transformer; a second field effect transistor electrically connected between the driving node and a ground, the second field effect transistor having a gate connected to a secondary winding of the second transformer; and a third transformer electrically connected to the driving node, wherein a voltage level applied to the gate of the first field effect transistor is maintained in a minus voltage level compared to a voltage level at the driving node during one cycle of the first control signal such that no direct current path exists between the gate of the first field effect transistor and the driving node.