Surgical generator for ultrasonic and electrosurgical devices
First Claim
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1. A surgical device, the surgical device comprising:
- an end effector to act on tissue; and
a control circuit configured for communication with a surgical generator, the control circuit comprising;
a conductor pair to communicate with the surgical generator;
a first circuit portion comprising;
a first switch configured to switch between an open state and a closed state;
a first resistor coupled in parallel with the first switch;
a second switch configured to switch between an open state and a closed state; and
a second resistor coupled in parallel with the second switch, wherein a combination of the first switch and the first resistor is coupled in series with a combination of the second switch and the second resistor;
a voltage reference coupled in parallel with the first circuit portion, wherein the control circuit is configured to receive from the generator and over the conductor pair an interrogation signal, wherein a state of at least one of the first switch or the second switch is determined from at least one characteristic of the interrogation signal;
a capacitor coupled in parallel with the first circuit portion;
a resistor coupled in series with the first circuit portion; and
a memory device coupled to the first circuit portion.
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Abstract
A control circuit of a surgical device is disclosed. The control circuit includes a first circuit portion coupled to at least one switch operable between an open state and a closed state. The first circuit portion communicates with a surgical generator over a conductor pair to receive a control signal to determine a state of the at least one switch.
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Citations
7 Claims
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1. A surgical device, the surgical device comprising:
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an end effector to act on tissue; and a control circuit configured for communication with a surgical generator, the control circuit comprising; a conductor pair to communicate with the surgical generator; a first circuit portion comprising; a first switch configured to switch between an open state and a closed state; a first resistor coupled in parallel with the first switch; a second switch configured to switch between an open state and a closed state; and a second resistor coupled in parallel with the second switch, wherein a combination of the first switch and the first resistor is coupled in series with a combination of the second switch and the second resistor; a voltage reference coupled in parallel with the first circuit portion, wherein the control circuit is configured to receive from the generator and over the conductor pair an interrogation signal, wherein a state of at least one of the first switch or the second switch is determined from at least one characteristic of the interrogation signal; a capacitor coupled in parallel with the first circuit portion; a resistor coupled in series with the first circuit portion; and a memory device coupled to the first circuit portion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification