#$%^&*AU2011265568B220140313.pdf#####SYSTEM AND METHOD FOR MEASURING CURRENT OF AN ELECTROSURGICAL GENERATOR ABSTRACT An electrosurgical generator (20) includes an RF output stage (28), a DC blocking capacitor (29), a measuring circuit (30), and a sensor circuit (21). The RF output stage (28) generates electrosurgical energy for application to an active electrode. The DC blocking capacitor (29) is electrically coupled between the RF output stage (28) and the active electrode. The measuring circuit (30) is coupled to the DC blocking capacitor (29) and measures the voltage across the DC blocking capacitor (29). The sensor circuit (21) determines the current of the electrosurgical energy as a function of the voltage across the DC blocking capacitor (29). 5858382_11/2 20 10 ELECTROSURGICAL GENERATOR FIG.1 20 243 2 28- 33 -29 SwT CONTROLLER HVPS RF OUTPUT V1 --30 -31 MICROPROCESSOR 21 26 34- CUT-OFF MEMORY CIRCUIT SENSOR REF CIRCUIT 22 23 LEAKAGE CURRENT MEASURING CIRCUIT FIG. 2
