Electrosurgical system energy source

An energy source for use with an electrosurgical system, comprising:

• a variable voltage power supply;
• a plurality of capacitors electrically coupled to the power supply;
• and
• a switching amplifier electrically coupled to the plurality of capacitors, wherein the switching amplifier is configured to output pulses of a biphasic alternating current (AC) waveform, wherein the pulses are operative to treat targeted tissue by inducing a change in voltage potential across cell membranes of the targeted tissue, and wherein the pulses cause no or minimal contraction in muscular tissue of the targeted tissue during treatment of the targeted tissue.

An energy source for use with an electrosurgical system, comprising:

• a power supply;
• one or more capacitors coupled to the power supply;
• and
• a switching component coupled to the one or more capacitors, wherein the switching component is configured to output pulses of a biphasic waveform, and wherein the pulses are capable of treating undesired tissue by inducing a change in voltage potential across cell membranes of a plurality of cells in the undesired tissue to promote non-thermal cell death in the plurality of cells while causing no or minimal contraction in muscular tissue in electrical contact with the undesired tissue during treatment of the undesired tissue.