Patent ID: 7342362

Claim:
A full-bridge soft switching inverter, comprising: a full-bridge circuit configuration comprising: a first p-channel MOSFET having a first gate, a first drain and a first source, wherein said first gate receives a first gate driving signal and said first source receives an input voltage; a first n-channel MOSFET having a second gate, a second drain and a second source, wherein said second gate receives a second gate driving signal, said second drain is coupled to said first drain and said second source is grounded; a second p-channel MOSFET having a third gate, a third drain and a third source, wherein said third gate receives a third gate driving signal and said third source receives said input voltage; and a second n-channel MOSFET having a fourth gate, a fourth drain and a fourth source, wherein said fourth gate receives a fourth gate driving signal, said fourth drain is coupled to said third drain and said fourth source is grounded; wherein said first gate driving signal and said second gate driving signal are substantially in-phase and the duty cycle of said second gate driving signal is greater than 50% and slightly smaller than that of said first gate driving signal so as to insure zero-voltage switching; wherein said third gate driving signal and said fourth gate driving signal are substantially in-phase and the duty cycle of said fourth gate driving signal is greater than 50% and slightly smaller than that of said third gate driving signal so as to insure zero-voltage switching; and wherein a zero-voltage circular current conducts between the first n-channel MOSFET and the second n-channel MOSFET.