and or rf output phase 38 which then adjusts the dc and or rf power supply respectively the controller 34 also receives input signals from the input controls of the generator 30 or the instrument 10 the controller 34 utilizes the input signals to adjust power outputted by the generator 30 and or performs other control functions thereon the forceps 10 is configured to operate in three modes or phases 1 electrosurgical tissue sealing 2 bipolar electrosurgical cutting and 3 duty cycle controlled or modulated waveform bipolar electrosurgical cutting the third mode or phase is applied when the tissue does not completely separate causing the tissue to have a very high electrical impedance fig4 illustrates a duty cycle controlled waveform 40 for use in the third phase the waveform 40 is shown with a fundamental frequency 45 and a duty cycle 42 where the duty cycle is the percentage of u201c on u201d time in a repetition rate 44 the time difference between pulses is the percentage of u201c off u201d time 46 in the repetition rate 44 the fundamental frequency 45 can range from 424 khz to 520 khz more specifically the fundamental frequency ranges from 448 khz to 496 khz the duty.