Patent ID: 6890331

Claim:
An electrosurgical apparatus comprising a high frequency generator ( 1 ) with an associated power control system; a handpiece ( 2 ) with means for removably mounting an electrode ( 5 ) therein; and a connection cable ( 3 ) between all output ( 4 ) of the generator and the handpiece ( 2 ); wherein the transfer characteristic of the system provides a substantially true ohmic transfer of loads on the electrode side of the connecting cable to the generator side thereof at or about a predetermined load impedance on the electrode ( 5 ), characterized in that said power control system comprises a driver stage ( 7 ) followed by a reflectometer ( 9 ) adapted and arranged to sense the generator output ( 4 ); and in that a detector ( 10 ) is adapted and arranged to supply a detector signal representing the reflected signal on the generator output ( 4 ), whereby said detector signal is communicated to said driver stage ( 7 ) for controlling the gain thereof.