Patent ID: 6228079
Filing Date: 2001-05-08
Classification: A61B,Y10S

Abstract:
A method for signal generation in an electro-surgical instrument including a first channel and a second channel for delivery of energy in the form of a first oscillating signal and a second oscillating signal to a surgical site, and the method for signal generation comprising the acts of:storing numerical values corresponding to sequential amplitude samples of a desired wave form;reading at set time intervals the numerical values stored in said storing act to produce a first oscillating signal and a second oscillating signal each with an amplitude proportionate to the values stored in said storing act;delaying the reading of the numerical values associated with first oscillating signal to introduce a phase shift of the first oscillating signal with respect the second oscillating signal;determining a difference between the actual power delivered by the first channel to the surgical site and a target power; andvarying a magnitude of the first oscillating signal and the second oscillating signal proportionate to the difference between the actual power and the target power.