Phase end point determination is provided to automatically halt the application of energy to tissue. An electrosurgical system (2) includes an electrosurgical generator (12), a feedback circuit (20) or controller (80) and an electrosurgical tool (40). The feedback circuit is configured to provide an electrosurgery endpoint by determining the phase end point of a tissue to be treated. The electrosurgical system can include more than one electrosurgical tool for different electrosurgical operations and can include a variety of user interface features and audio/visual performance indicators. The electrosurgical system can also power conventional bipolar electrosurgical tools and direct current surgical appliances.
