RF GENERATOR SYSTEM FOR SURGICAL VESSEL SEALING

1 - 20 . (canceled)

21 . A method of providing power to an electrosurgical instrument comprising:

generating a non-sinusoidal driving voltage having a substantially constant driving frequency;

providing the non-sinusoidal driving voltage to an LC circuit having a resonant frequency of substantially twice the substantially constant driving frequency;

generating a quasi-sinusoidal current in the LC circuit from the non-sinusoidal driving voltage; and

providing the quasi-sinusoidal current to an electrical output, wherein the electrical output is configured for coupling to an electrical input of a surgical instrument.