Electrosurgery apparatus

Electrosurgery apparatus for providing a pulsed electrosurgery output, said apparatus comprising:

• a processor, said processor providing a data stream output comprising at least three separate, digitally-represented values indicative respectively of the width of each pulse, the duration of a first period during which pulses are to be generated and the duration of a second period during which pulses are not to be generated;
• a switch control unit;
• means connecting said switch control unit to said processor so that said switch control unit receives the data stream output and provides at least two switching outputs in accordance therewith;
• a switching circuit, said switching circuit including a transformer having a secondary winding and a primary winding and two switching transistors connected between ground and respective opposite ends of said primary winding;
• a voltage source;
• means connecting said voltage source to a center tapping of said primary winding;
• and means connecting the switching circuit to said switching transistors so that two pulsed signals are applied across the primary winding to produce said pulsed electrosurgery output across said secondary winding in accordance therewith.

Electrosurgery apparatus for providing a pulsed electrosurgery output, said apparatus comprising:

• a processor, said processor providing a data stream output comprising at least five separate, digitally-represented values indicative respectively of the width of each pulse, the duration of a first period during which the pulses are to be generated, the duration of a second period during which pulses are not to be generated, the duration of a third period during which pulses are to be generated and the duration of a fourth period during which pulses are not to be generated, and two further digital instructions as to whether or not the electrosurgery output is to be cut only and whether or not the electrosurgery output is to include spray coagulation;
• a switch control unit;
• means connecting said switch control unit to said processor so that said switch control unit receives the data stream output and provides a switching output in accordance therewith;
• a switching circuit;
• a voltage source;
• means connecting the switching circuit to said switch control unit so that said switching circuit receives the output of the switch control unit;
• and means connecting said voltage source to said switching circuit so that said pulsed electrosurgery output is produced by switching of said switching circuit.