Impedance Matching Circuit
AssigneeDomain Surgical, Inc.
InventorsPreston Manwaring, Kim Manwaring, Mark Stringham, Phil Eggers
Life of this patent
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Abstract
An impedance matching circuit may be used to adjust for manufacturing and design tolerances in a surgical instrument. The matching circuit may match the load of a thermal element with the impedance of a power source used to deliver electrical energy to the surgical instrument. The matching circuit may include capacitors, inductors, coaxial cables, varactors, transformers, resistors, and/or combinations thereof. The matching circuit may also comprise a circuit board or flex board layers which may be modified to adjust the impedance of the load.
Claims22
A thermal surgical instrument comprising:
- a thermal element configured to generate thermal energy in response to an electrical signal;
- and
- a matching circuit electrically connected to the thermal element;
- wherein the matching circuit, in combination with the thermal element, has an input impedance.
A method of matching an input impedance of a load of a thermal surgical instrument with an output impedance of a power source comprising the steps of:
- selecting a thermal surgical tool having a thermal element and a circuit board;
- disposing a component on the circuit board to form a matching circuit;
- wherein the thermal element and the matching circuit comprise a load having an adjustable input impedance.
A method of manufacturing a thermal surgical instrument comprising the steps of:
- selecting a surgical instrument comprising a thermal element;
- disposing a matching circuit in electrical communication with the thermal element such that the matching circuit, in combination with the thermal element, has an input impedance adjusting the input impedance so that it matches an output impedance of a power source.
Dependencies are inferred from the claim text.