EXTERNAL POWER SOURCE FOR AN IMPLANTABLE MEDICAL DEVICE HAVING AN ADJUSTABLE CARRIER FREQUENCY AND SYSTEM AND METHOD RELATED THEREFORE
First Claim
1. A charger for an implantable medical device having a rechargeable power source and a secondary charging coil operatively coupled to said rechargeable power source, comprising:
- a primary charging coil; and
circuitry, operatively coupled to said primary charging coil, capable of inductively energizing said secondary coil by driving said primary charging coil at a carrier frequency when said primary charging coil of said external charger is externally placed in proximity of said secondary charging coil creating a tuned inductive charging circuit having an energy transfer efficiency;
said circuitry adjusting said carrier frequency to increase said energy transfer efficiency of said inductively tuned charging circuit.
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Accused Products
Abstract
A transcutaneous energy transfer system, transcutaneous charging system, external power source, external charger and methods of transcutaneous energy transfer and charging for an implantable medical device and an external power source/charger. The implantable medical device has a secondary coil adapted to be inductively energized by an external primary coil at a carrier frequency. The external power source/charger has a primary coil and circuitry capable of inductively energizing the secondary coil by driving the primary coil at a carrier frequency adjusted to the resonant frequency to match a resonant frequency of the tuned inductive charging circuit, to minimize the impedance of the tuned inductive charging circuit or to increase the efficiency of energy transfer.
17 Citations
30 Claims
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1. A charger for an implantable medical device having a rechargeable power source and a secondary charging coil operatively coupled to said rechargeable power source, comprising:
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a primary charging coil; and circuitry, operatively coupled to said primary charging coil, capable of inductively energizing said secondary coil by driving said primary charging coil at a carrier frequency when said primary charging coil of said external charger is externally placed in proximity of said secondary charging coil creating a tuned inductive charging circuit having an energy transfer efficiency; said circuitry adjusting said carrier frequency to increase said energy transfer efficiency of said inductively tuned charging circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for charging, comprising:
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an implantable medical device, comprising; a rechargeable power source; and a secondary charging coil operatively coupled to said rechargeable power source; and an external charger, comprising; a primary charging coil; and circuitry, operatively coupled to said primary charging coil, capable of inductively energizing said secondary coil by driving said primary charging coil at a carrier frequency when said primary charging coil of said external charger is externally placed in proximity of said secondary charging coil creating a tuned inductive charging circuit having an energy transfer efficiency; said circuitry adjusting said carrier frequency to increase said energy transfer efficiency of said inductively tuned charging circuit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of charging a rechargeable power source of a medical device implanted in a patient, having a secondary charging coil operatively coupled to said rechargeable power source, using an external charger having a primary charging coil, comprising the steps of:
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positioning said primary charging coil externally of said patient in proximity of said secondary charging coil; inductively energizing said secondary charging coil by driving said primary charging coil at a carrier frequency, creating a tuned inductive charging circuit having an energy transfer efficiency; and adjusting said carrier frequency to increase said energy transfer efficiency of said tuned inductive charging circuit. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification