An electrosurgical system includes a generator for generating radio frequency power, and an electrosurgical instrument including at least three electrodes and. The generator includes a radio frequency output stage having at least a pair of RF output lines, and a power supply coupled to the output stage...http://www.google.com/patents/US20030163124?utm_source=gb-gplus-sharePatent US20030163124 - Electrosurgical generator and system
