Patent ID: 7648499

Claim:
An electrosurgical generator comprising: a power supply operable to generate a DC voltage; a first parallel inductor-capacitor circuit configured to be driven by a first signal at a first predetermined frequency; a second parallel inductor-capacitor circuit configured to be driven by a second signal at the first predetermined frequency phase-shifted 180°; a series inductor-capacitor resonant circuit operably connected in series with a primary winding of a transformer, the first and second parallel inductor-capacitor circuits operably connected to the transformer, the first parallel inductor-capacitor circuit being configured to generate a positive half sine wave from the DC voltage and the second parallel inductor-capacitor circuit being configured to generate a 180° phase-shifted positive half sine wave from the DC voltage to generate a full sine wave in a secondary winding of the transformer; and a temperature circuit configured to determine temperature at a surgical site and adjust the DC voltage generated by the power supply.