Crest-factor control of phase-shifted inverter

An electrosurgical generator, comprising:

• an RF output stage comprising an RF inverter coupled to a power source, the RF output stage configured to generate at least one electrosurgical waveform at a selected energy setting, the at least one electrosurgical waveform having a duty cycle and a crest factor;
• a controller configured to adjust a repetition rate of the at least one electrosurgical waveform based on the selected energy setting to regulate the duty cycle of the at least one electrosurgical waveform;
• and
• a sensor configured to measure an output voltage of the at least one electrosurgical waveform, the controller configured to supply a control signal to the RF inverter based on the repetition rate when the output voltage is increasing to regulate the crest factor of the at least one electrosurgical waveform.

An electro surgical system, comprising:

• an electrosurgical generator comprising:
• an RF output stage comprising an RF inverter coupled to a power source, the RF output stage configured to generate at least one electrosurgical waveform at a selected energy setting, the at least one electrosurgical waveform having a duty cycle and a crest factor;
• a controller configured to adjust a repetition rate of the at least one electrosurgical waveform based on the selected energy setting to regulate the duty cycle of the at least one electrosurgical waveform;
• and
• a sensor configured to measure an output voltage of the at least one electrosurgical waveform, the controller configured to supply a control signal to the RF inverter based on the repetition rate when the output voltage is increasing to regulate the crest factor of the at least one electrosurgical waveform.