Radio frequency generator and method for a cordless medical cauterization and cutting device
First Claim
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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Accused Products
Abstract
A circuit for generating a radio-frequency signal for a surgical device is disclosed. The circuit has a voltage regulator that supplies direct current (DC) voltage, a first MOSFET, a second MOSFET, and a MOSFET driver. The MOSFET driver receives the DC voltage supplied from the voltage regulator and has a local oscillator. The local oscillator switches the first MOSFET and the second MOSFET on and off at a frequency generated by the local oscillator. The circuit further includes a transformer connected to the first and second MOSFETs, having a center tap and a main voltage applied at the center tap, and providing an alternating current (AC) output.
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Citations
15 Claims
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1. A circuit for generating a radio-frequency signal for a surgical device, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification