Implantable Medical Device with Single Coil for Charging and Communicating
First Claim
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1. An implantable medical device, comprising:
- a single coil,wherein the single coil is tunable to wirelessly receive power at a first frequency for charging a battery in the implantable medical device, and is tunable to wirelessly receive and transmit data at a second frequency.
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Abstract
A combination charging and telemetry circuit for use within an implantable device, such as a microstimulator, uses a single coil for both charging and telemetry. In accordance with one aspect of the invention, one or more capacitors are used to tune the single coil to different frequencies, wherein the coil is used for multiple purposes, e.g., for receiving power from an external source and also for the telemetry of information to and from an external source.
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Citations
18 Claims
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1. An implantable medical device, comprising:
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a single coil, wherein the single coil is tunable to wirelessly receive power at a first frequency for charging a battery in the implantable medical device, and is tunable to wirelessly receive and transmit data at a second frequency. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An implantable medical device, comprising;
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a rechargeable battery; a resonant circuit comprising a single coil, wherein the resonant circuit is tunable to a first frequency to receive power from an external source and is tunable to a second frequency to receive data from an external source; a first switch coupling a first end of the coil to a power source voltage; a second switch coupling a second end of the coil to ground; a rectifier circuit coupled to the resonant circuit for converting the received power to a DC voltage for charging the battery; and a receiver coupled to the resonant circuit for decoding the received data. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An implantable neurostimulator device, comprising:
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a housing; a rechargeable battery within the housing; a single coil within the housing, wherein the single coil is tunable to wirelessly receive power at a first frequency for charging the rechargeable battery, and is tunable to wirelessly receive and transmit data at a second frequency; and a plurality of electrodes external to the housing for stimulating tissue, wherein the electrodes receive power from the rechargeable battery. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification