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Radio frequency generator and method for a cordless medical cauterization and cutting device

  • US 9,782,217 B2
  • Filed: 02/14/2014
  • Issued: 10/10/2017
  • Est. Priority Date: 11/13/2008
  • Status: Active Grant
First Claim
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1. A circuit for generating a radio-frequency signal for a surgical device, comprising:

  • a voltage regulator including a direct current (DC) voltage output;

    a first MOSFET including a first terminal, a second terminal, and a third terminal;

    a second MOSFET including a first terminal, a second terminal, and a third terminal, wherein the first terminal of the first MOSFET is coupled to the first terminal of the second MOSFET;

    a MOSFET driver including;

    an input coupled to the DC voltage output of the voltage regulator;

    a first output;

    a second output; and

    a local oscillator directly coupled to the second terminal of the first MOSFET by way of the first output of the MOSFET driver and directly coupled to the second terminal of the second MOSFET by way of the second output of the MOSFET driver; and

    a transformer including a first terminal, a second terminal, and a center tap, wherein the first terminal of the transformer is directly coupled to the third terminal of the first MOSFET, the second terminal of the transformer is directly coupled to the third terminal of the second MOSFET, and a main voltage is configured to be applied at the center tap.

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