Patent ID: 7502243
Filing Date: 2009-03-10
Classification: H02M

Abstract:
1. An inverter for converting a DC voltage signal to an AC voltage signal, comprising: 1) a drive circuit providing a first drive signal and a second drive signal, the drive circuit having an input terminal for receiving an operating voltage signal; 2) a switch circuit generating a voltage signal at an output terminal, the switch circuit including a high-side transistor for receiving the first drive signal from the drive circuit ad a low-side transistor for receiving the second drive signal from the drive circuit, the high-side transistor and the low-side transistor being coupled in series between the DC voltage signal and ground, the high-side transistor having a gate-source voltage; 3) an auxiliary circuit adjusting the gate-source voltage of the high-side transistor, the auxiliary circuit being coupled to the drive circuit for providing the operating voltage and to the output terminal of the switch circuit for receiving the voltage signal, the auxiliary circuit comprises: 4) a transformer circuit coupled to the switch circuit at the output terminal and being capable of transforming the voltage signal into the AC voltage signal, wherein the transformer circuit having a primary winding, a secondary winding, and a capacitance circuit, the primary winding having a first end and a second end, the primary winding further having a first number of turns, the secondary winding outputting the AC voltage signal.