Implantable medical devices and systems having dual frequency inductive telemetry and recharge
First Claim
Patent Images
1. An implantable medical device, comprising:
- a first tank circuit that is tuned to a first frequency and that comprises a first coil portion and a separate first capacitance electrically connected in a series combination directly with the first coil portion;
a second tank circuit that is tuned to a second frequency that is different than the first frequency and the second tank circuit further comprising a second coil portion and a separate second capacitance electrically connected in a series combination directly with the second coil portion, the series combination of the second coil portion and the second capacitance being directly electrically connected to the series combination of the first coil portion and the first capacitance with a connection point between the first tank circuit and the second tank circuit establishing a first node;
a receiver with at least one input that is electrically connected directly to the second coil portion or the second capacitance and not directly electrically connected to the first coil portion and the first capacitance;
a battery;
a rectifier electrically coupled between the battery and across at least one of the first coil portion and the first capacitance of the first tank circuit;
andmedical circuitry electrically coupled to the battery.
1 Assignment
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Accused Products
Abstract
Implantable devices and related systems utilize coils or coil portions of a coil for inductive telemetry at one frequency and recharge at another frequency. The coils or coil portions are included in one or more tank circuits that share at least one node between the coils or coil portions. The recharge application may be provided with variations for aspects including power management and rectification. The telemetry application may be provided with variations for aspects including receiver connectivity for the downlink and coil driving for the uplink.
142 Citations
20 Claims
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1. An implantable medical device, comprising:
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a first tank circuit that is tuned to a first frequency and that comprises a first coil portion and a separate first capacitance electrically connected in a series combination directly with the first coil portion; a second tank circuit that is tuned to a second frequency that is different than the first frequency and the second tank circuit further comprising a second coil portion and a separate second capacitance electrically connected in a series combination directly with the second coil portion, the series combination of the second coil portion and the second capacitance being directly electrically connected to the series combination of the first coil portion and the first capacitance with a connection point between the first tank circuit and the second tank circuit establishing a first node; a receiver with at least one input that is electrically connected directly to the second coil portion or the second capacitance and not directly electrically connected to the first coil portion and the first capacitance; a battery; a rectifier electrically coupled between the battery and across at least one of the first coil portion and the first capacitance of the first tank circuit; and medical circuitry electrically coupled to the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A medical system, comprising:
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an external device comprising; a telemetry module; a controller that sends telemetry signals through the telemetry module; and an implantable medical device comprising; a first tank circuit that is tuned to a first frequency and that comprises a first coil portion and a separate first capacitance electrically connected in a series combination directly with the first coil portion; a second tank circuit that is tuned to a second frequency that is different than the first frequency and the second tank circuit further comprising a second coil portion and a separate second capacitance electrically connected in a series combination directly with the second coil portion, the series combination of the second coil portion and the second capacitance being directly electrically connected to the series combination of the first coil portion and the first capacitance with a connection point between the first tank circuit and the second tank circuit establishing a first node; a receiver with at least one input that is electrically connected directly to the second coil portion or the second capacitance and not directly electrically connected to the first coil portion and the first capacitance; a battery; a rectifier electrically coupled between the battery and across at least one of the first coil portion and the first capacitance of the first tank circuit; and medical circuitry electrically coupled to the battery. - View Dependent Claims (13, 14, 15)
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16. A method of providing telemetry and recharging for an implantable medical device, comprising:
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receiving a first collection of energy at a first frequency via a first tank circuit of an implantable medical device that is tuned to the first frequency by a first coil portion and a separate first capacitance of the first tank circuit that are directly electrically connected in a series combination; receiving a second collection of energy at a second frequency via a second tank circuit of the implantable medical device that is tuned to the second frequency by a second coil portion and a separate second capacitance of the second tank circuit that are directly electrically connected in a series combination; obtaining the second collection of energy from the second tank circuit at a receiver of the implantable medical device, the receiver comprising at least one input that is directly connected to the second coil portion or the second capacitance and not directly electrically connected to the first coil portion and the first capacitance passing the first collection of energy from the first tank circuit through a rectifier of the implantable medical device that is electrically coupled across at least one of the first coil portion and the first capacitance of the first tank circuit to provide a rectified collection of energy to a battery of the implantable medical device, the battery being electrically coupled to the rectifier; and providing the rectified collection of energy from the battery to medical circuitry of the implantable medical device, the medical circuitry being electrically coupled to the battery. - View Dependent Claims (17, 18, 19)
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20. An implantable medical device, comprising:
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a first tank circuit that is tuned to a first frequency and that comprises a first coil portion and a separate first capacitance electrically connected in a series combination with the first coil portion, the series combination of the first coil portion and the first capacitance being electrically connected to a first node; a second tank circuit that is tuned to a second frequency that is different than the first frequency and the second tank circuit further comprising a second coil portion and a separate second capacitance electrically connected in a series combination with the second coil portion, the series combination of the second coil portion and the second capacitance being electrically connected to the first node; a receiver with at least one input electrically connected to the second tank circuit; a battery; a rectifier electrically coupled between the battery and the first tank circuit; and medical circuitry electrically coupled to the battery, wherein the rectifier is a full-wave rectifier, wherein the first tank circuit comprises a second node on a side of the first tank circuit opposite the first node, wherein the rectifier comprises a first pair of diodes where a first diode of the first pair is electrically connected between the first node of the first tank circuit and ground and a second diode of the first pair is electrically connected between the second node of the first tank circuit and the battery allowing current flowing through the first tank circuit in a first direction to be directed to the battery and a second pair of diodes where a first diode of the second pair is electrically connected between the second node of the first tank circuit and ground and a second diode of the second pair is electrically connected between the first node of the first tank circuit and the battery allowing current flowing through the first tank circuit in a second direction to be directed to the battery.
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Specification