System and method for generating radio frequency energy
First Claim
1. An electrosurgical generator comprising:
- a power supply operable to generate a DC voltage;
a first parallel inductor-capacitor circuit configured to be driven by a first signal at a first predetermined frequency;
a second parallel inductor-capacitor circuit configured to be driven by a second signal at the first predetermined frequency phase-shifted 180°
;
a series inductor-capacitor resonant circuit operably connected in series with a primary winding of a transformer, the first and second parallel inductor-capacitor circuits operably connected to the transformer, the first parallel inductor-capacitor circuit being configured to generate a positive half sine wave from the DC voltage and the second parallel inductor-capacitor circuit being configured to generate a 180°
phase-shifted positive half sine wave from the DC voltage to generate a full sine wave in a secondary winding of the transformer;
anda temperature circuit configured to determine temperature at a surgical site and adjust the DC voltage generated by the power supply.
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Accused Products
Abstract
An electrosurgical generator is disclosed. The electrosurgical generator includes a power supply for generating a DC voltage. The electrosurgical generator also includes a first parallel inductor-capacitor circuit being driven by a first signal at a first predetermined frequency and a second parallel inductor-capacitor inductor-capacitor circuit driven by a second signal at the first predetermined frequency phase shifted 180°. The electrosurgical generator further includes a series inductor-capacitor resonant circuit operably connected in series with a primary winding of a transformer. The first and second parallel inductor-capacitor circuits are operably connected to the transformer, such that the first inductor-capacitor circuit generates a positive half sine wave and the second inductor-capacitor circuit generates a 180° phase-shifted positive half sine wave to generate a full sine wave in a secondary winding of the transformer.
854 Citations
20 Claims
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1. An electrosurgical generator comprising:
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a power supply operable to generate a DC voltage; a first parallel inductor-capacitor circuit configured to be driven by a first signal at a first predetermined frequency; a second parallel inductor-capacitor circuit configured to be driven by a second signal at the first predetermined frequency phase-shifted 180°
;a series inductor-capacitor resonant circuit operably connected in series with a primary winding of a transformer, the first and second parallel inductor-capacitor circuits operably connected to the transformer, the first parallel inductor-capacitor circuit being configured to generate a positive half sine wave from the DC voltage and the second parallel inductor-capacitor circuit being configured to generate a 180°
phase-shifted positive half sine wave from the DC voltage to generate a full sine wave in a secondary winding of the transformer;and a temperature circuit configured to determine temperature at a surgical site and adjust the DC voltage generated by the power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for generating high frequency electrosurgical current comprising the steps of:
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providing a power supply operable to generate a DC voltage, a first parallel inductor-capacitor circuit, a second parallel inductor-capacitor circuit, a series inductor-capacitor resonant circuit, wherein the first parallel inductor-capacitor circuit, the second parallel inductor-capacitor circuit, the series inductor-capacitor resonant circuit are operably connected in series with a primary winding of a transformer, and a temperature circuit configured to determine temperature at a surgical site and adjust the DC voltage generated by the power supply; driving the first parallel inductor-capacitor circuit by a first signal at a first predetermined frequency; driving the second parallel inductor-capacitor circuit by a second signal at the first predetermined frequency phase-shifted 180°
; andgenerating a positive half sine wave at the first inductor-capacitor parallel circuit; generating a 180°
phase-shifted positive half sine wave at the second parallel inductor-capacitor circuit;combining the positive half sine wave and the 180°
phase-shifted positive half sine wave at a secondary winding of the transformer to generate a full sine wave; anddetermining temperature at the surgical site by the temperature circuit to adjust the DC voltage generated by the power supply. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification