#$%^&*AU2007201795B920130718.pdf#####ARC BASED ADAPTIVE CONTROL SYSTEM FOR AN ELECTROSURGICAL UNIT Abstract A system and method for performing electrosurgical procedures are disclosed. 5 The system includes an electrosurgical generator (20) adapted to supply electrosurgical energy to tissue in form of one or more electrosurgical waveforms having a crest factor and a duty cycle. The system also includes sensor circuitry (22) adapted to measure impedance and to obtain one or more measured impedance signals. The sensor circuitry (22) is further adapted to generate one or more arc detection signals upon detecting an 10 arcing condition. The system further includes a controller (24) adapted to generate one or more target control signals as a function of the measured impedance signals and to adjust output of the electrosurgical generator (20) based on the arc detection signal. An electrosurgical instrument (10) is also included having one or more active electrodes adapted to apply electrosurgical energy to tissue.1/2 20 12 10 ELECTROSURGICAL P GENERATOR FIG. 1 420 24-- 272 CONTROLLER RF OUTPUT STAGE 25 HIGH PASS MICROPROCESSOR 29 FILTER 26OWPASS MEMORY 30 FILTER SENSOR 22 CIRCUITRY FIG. 2
