Circuit for discriminating between battery charging signals and RF telemetry signals received by a single coil in an implantable medical device
First Claim
1. A medical device for providing an electrical stimulation therapy for a patient, the medical device comprising:
- a coil configured to receive both inductive charging signals and telemetry signals from one or more external devices that are external to the medical device, wherein the inductive charging signals are in a first frequency band, and wherein the telemetry signals are in a second frequency band that is substantially higher than the first frequency band;
inductive charging circuitry configured to provide electrical power to the medical device via the inductive charging signals;
telemetry circuitry configured to conduct telecommunications with the one or more external devices via the telemetry signals;
a first component that is electrically coupled between the coil and the inductive charging circuitry, wherein the first component is configured to allow the inductive charging signals to pass through; and
a second component that is electrically coupled between the coil and the telemetry circuitry, wherein the second component is configured to substantially block the inductive charging signals while allowing the telemetry signals to pass through.
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Accused Products
Abstract
A medical device for providing a stimulation therapy includes a coil configured to receive both inductive charging and telemetry signals. The inductive charging signals are in a first frequency band. The telemetry signals are in a second frequency band higher than the first frequency band. The medical device includes inductive charging circuitry configured to provide electrical power to the medical device via the inductive charging signals. The medical device includes telemetry circuitry configured to conduct telecommunications with external device via the telemetry signals. The medical device includes a first component electrically coupled between the coil and the inductive charging circuitry. The first component is configured to allow the inductive charging signals to pass through. The medical device includes a second component electrically coupled between the coil and the telemetry circuitry. The second component is configured to substantially block the inductive charging signals while allowing the telemetry signals to pass through.
87 Citations
20 Claims
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1. A medical device for providing an electrical stimulation therapy for a patient, the medical device comprising:
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a coil configured to receive both inductive charging signals and telemetry signals from one or more external devices that are external to the medical device, wherein the inductive charging signals are in a first frequency band, and wherein the telemetry signals are in a second frequency band that is substantially higher than the first frequency band; inductive charging circuitry configured to provide electrical power to the medical device via the inductive charging signals; telemetry circuitry configured to conduct telecommunications with the one or more external devices via the telemetry signals; a first component that is electrically coupled between the coil and the inductive charging circuitry, wherein the first component is configured to allow the inductive charging signals to pass through; and a second component that is electrically coupled between the coil and the telemetry circuitry, wherein the second component is configured to substantially block the inductive charging signals while allowing the telemetry signals to pass through. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of providing discrimination for a plurality of types of input signals received from a single antenna in a medical device, the method comprising:
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receiving, via the single antenna, inductive charging signals and first telemetry signals from one or more external devices that are external to the medical device, wherein the inductive charging signals are in a first frequency band, the first telemetry signals are in a second frequency band that is substantially higher than the first frequency band; generating, via a first circuit coupled to the single antenna, a resonant frequency substantially near the first frequency band such that the first circuit allows the inductive charging signals to pass through while attenuating the first telemetry signals; and rejecting, via a second circuit coupled to the single antenna, the inductive charging signals while allowing the first telemetry signals to pass through. - View Dependent Claims (11, 12, 13)
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14. A method of providing telemetry discrimination for a plurality of input signals for a medical device, the method comprising:
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receiving, via an antenna and from one or more external devices external to the medical device, inductive charging signals in a first frequency band, first telemetry signals in a second frequency band that is substantially higher than the first frequency band, and second telemetry signals in a third frequency band that is substantially higher than the second frequency band, wherein the first telemetry signals contain stimulation programming instructions for an implantable pulse generator (IPG), and wherein the second telemetry signals contain signals for waking up the IPG; generating, via a first circuit, a resonant frequency centered around the first frequency band; rejecting, via a second circuit, the inductive charging signals and the second telemetry signals, wherein the second circuit allows the first telemetry signals to pass through; and rejecting, via a third circuit, the inductive charging signals and the first telemetry signals, wherein the third circuit allows the second telemetry signals to pass through. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification