Methods and apparatus are provided for use in performing electrosurgery, wherein a power supply supplies an electrosurgical instrument with a low voltage power signal having a substantially constant peak-to-peak voltage that is independent of the load impedance and which has a crest factor near unity....http://www.google.com/patents/US5472443?utm_source=gb-gplus-sharePatent US5472443 - Electrosurgical apparatus employing constant voltage and methods of use
