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Electrosurgical generator and system

  • US 6,261,286 B1
  • Filed: 10/16/1998
  • Issued: 07/17/2001
  • Est. Priority Date: 06/23/1995
  • Status: Expired due to Term
First Claim
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1. An electrosurgical generator for supplying radio frequency power to an electrical instrument, the generator comprising:

  • a radio frequency output stage having at least a pair of electrosurgical output connections for the delivery of radio frequency power to the instrument, said output stage further comprising a resonant output circuit coupled to the output connections and a switching device coupled to the resonant output circuit;

    a power supply coupled to the output stage for supplying power to the output stage; and

    control circuitry including a sensing circuit for deriving a sensing signal representative of the radio frequency peak output voltage developed across the output connections, said control circuitry operable to actuate the switching device to reduce the delivered radio frequency power when the peak output voltage reaches a predetermined threshold limit.

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