Patent ID: 8223513

Claim:
An inverter comprising: a pulse width modulation (PWM) circuit comprising a first output terminal; a direct current (DC) voltage input terminal; a storage capacitor; a first transformer comprising: a first primary winding comprising a first terminal and a second terminal capable of being grounded via the storage capacitor; a soft start circuit comprising an inductor and a first capacitor; a first transistor, a gate electrode of the first transistor connected to the first output terminal, a source electrode of the first transistor connected to the first terminal of the first transformer via the inductor, a drain electrode of the first transistor connected to the DC voltage input terminal and connected to the source electrode of the first transistor via the first capacitor; wherein the inverter further comprises a second transistor, the PWM circuit further comprises a second output terminal, a gate electrode of the second transistor is connected to the second output terminal, a source electrode of the second transistor is grounded, and a drain electrode of the second transistor is connected to the source electrode of the first transistor; wherein the soft start circuit further comprises a diode and a resistor, an anode of the diode is connected to the source electrode of the first transistor, a cathode of the diode is connected to the drain electrode of the first transistor via the first capacitor, and the resistor is connected in parallel with the first capacitor.