Patent ID: 9504516
Filing Date: 2016-11-29
CPC Classification: A61B

Claim Text:
1. A system for controlling an electrosurgical generator using a gain-compensated full bridge topology, comprising: a summation unit configured to receive a radiofrequency (RF) setpoint signal and a calculated output signal, and to generate a first error signal corresponding to a difference between the RF setpoint signal and the calculated output signal; an impedance gain compensation unit configured to receive the first error signal and an impedance signal corresponding to a load impedance, and to generate a second error signal by applying an impedance correction calculation to the first error signal; a controller configured to receive the second error signal and to generate a phase control signal; a phase gain compensation unit, comprising: a full bridge inverter configured to receive the first full bridge driving signal and the second full bridge driving signal and generate an electrosurgical output signal having an electrical property corresponding to a difference in phase between the first full bridge driving signal and the second full bridge driving signal; and a sensor circuit configured to sense an electrical property of the electrosurgical output signal and generate a corresponding calculated output signal.