PULSE GENERATING CIRCUIT, AND ELECTROSURGICAL GENERATOR INCORPORATING THE SAME

• Main Authors: HANCOCK, Christopher Paul, DAVIES, Ilan, HODGKINS, George
• Format: Patent
• Language: English; French; German
• Published: 15.05.2024
• Subjects: BASIC ELECTRONIC CIRCUITRY; DIAGNOSIS; ELECTRICITY; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; PULSE TECHNIQUE; SURGERY

A bipolar pulse generating circuit for an electrosurgical generator generates a waveform for electroporation of biological tissue comprising a voltage source connectable to a load via a switching element, and a coaxial transmission line having an inner conductor separated from an outer conductor. The inner conductor first end is connected between the switching element and the voltage source and second end is in an open circuit condition, whereby the line is charged when the switching element is OFF and discharged when the element is ON. The bipolar pulse generating circuit has an output connectable to the load, wherein the first output supports a positive pulse when the line discharges, and a second output supports a negative pulse when the line discharges. The impedance of the coaxial transmission line matches a sum of impedance of the switching element, the load at the first output, and the load at the second output.