Minimizing interference between charging and telemetry coils in an implantable medical device
First Claim
1. An implantable medical device, comprising:
- a charging coil for receiving power from an external charger;
a telemetry coil for receiving and/or transmitting data from and/or to an external controller; and
decoupling circuitry controllable to reduce or remove a current in the charging coil when receiving and/or transmitting data from and/or to the external controller.
1 Assignment
0 Petitions
Accused Products
Abstract
An improved implantable pulse generator (IPG) containing improved telemetry circuitry is disclosed. The IPG includes charging and telemetry coils within the IPG case, which increases their mutual inductance and potential to interfere with each other; particularly problematic is interference to the telemetry coil caused by the charging coil. To combat this, improved telemetry circuitry includes decoupling circuitry for decoupling the charging coil during periods of telemetry between the IPG and an external controller. Such decoupling circuitry can comprise use of pre-existing LSK circuitry during telemetry, or new discrete circuitry dedicated to decoupling. The decoupling circuitry is designed to prevent or at least reduce induced current flowing through the charging coil during data telemetry. The decoupling circuitry can be controlled by the microcontroller in the IPG, or can automatically decouple the charging coil at appropriate times to mitigate an induced current without instruction from the microcontroller.
102 Citations
31 Claims
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1. An implantable medical device, comprising:
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a charging coil for receiving power from an external charger; a telemetry coil for receiving and/or transmitting data from and/or to an external controller; and decoupling circuitry controllable to reduce or remove a current in the charging coil when receiving and/or transmitting data from and/or to the external controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable medical device, comprising:
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a charging coil for receiving power from an external charger; a telemetry coil, wherein the telemetry coil can be enabled for the receipt and/or transmission of data from and/or to an external controller; and decoupling circuitry controllable to decouple the charging coil when the telemetry coil is enabled for the receipt and/or transmission of data from and/or to the external controller. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. An implantable medical device, comprising:
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a charging coil for receiving a magnetic charging field from an external charger, wherein the received magnetic charging field is used to power the implantable medical device; a telemetry coil for receiving and/or transmitting data from and/or to an external controller; and decoupling circuitry controllable to couple the charging coil to the charging circuitry when receiving the magnetic charging field, but controllable to decouple the charging coil when not receiving the magnetic charging field. - View Dependent Claims (21, 22, 23, 24)
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25. An implantable medical device, comprising:
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a charging coil for receiving power from an external charger; a telemetry coil communicating with an external controller; and decoupling circuitry, wherein the decoupling circuitry is controllable to decouple the charging coil when the telemetry coil is communicating or enabled to communicate with the external controller, and is controllable to decouple the telemetry coil when the charging coil is receiving power or enabled to receive power from the external charger. - View Dependent Claims (26, 27)
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28. An implantable medical device, comprising:
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a case; a charging coil within the case for receiving power from an external charger; a telemetry coil within the case a telemetry coil for receiving and/or transmitting data from and/or to an external controller; and decoupling circuitry controllable to reduce or remove a current in the charging coil when receiving and/or transmitting data from and/or to the external controller. - View Dependent Claims (29, 30, 31)
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Specification