Pulse generating circuit, and electrosurgical generator incorporating the same

A bipolar pulse generating circuit for an electrosurgical generator, the bipolar pulse generating circuit comprising:

• a voltage source connectable to a load via a switching element;
• a coaxial transmission line having an inner conductor separated from an outer conductor by a dielectric material, wherein the inner conductor has a first end connected between an input of the switching element and the voltage source and a second end in an open circuit condition, whereby the coaxial transmission line is charged by the voltage source when the switching element is in an OFF state and to be discharged when the switching element is in an ON state;
• a first output connectable to the load, wherein the first output is located between an output of the switching element and ground to support a positive pulse when the coaxial transmission line discharges;
• and
• a second output connectable to the load, wherein the second output is located between the outer conductor of the coaxial transmission line and ground to support a negative pulse when the coaxial transmission line discharges,
• wherein the impedance of the coaxial transmission line is configured to match a sum of (i) the impedance the switching element, (ii) the impedance of the load at the first output, and (iii) the impedance of the load at the second output,
• wherein a delay line is connected to either the first output or the second output, whereby supply of the positive pulse and negative pulse at the first output and second output occurs sequentially.