Split coil for uniform magnetic field generation from an external charger for an implantable medical device
First Claim
1. An external charger for wirelessly providing power to an implantable medical device (IMD), comprising:
- a circuit board having a plane; and
a charging coil configured to produce a magnetic field to provide power to the IMD, wherein the charging coil comprises a first mechanically-wound coil portion on a first side of the circuit board and a second mechanically-wound coil portion on a second side of the circuit board, wherein the first coil portion and the second coil portion are connected in series, and wherein the first and second coil portions are formed in planes parallel to the plane of the circuit board.
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Accused Products
Abstract
A charging system for an Implantable Medical Device (IMD) includes a split charging coil for generating a magnetic field to provide power to the IMD. The split charging coil includes a first coil portion and a second coil portion, each of which can be formed as a mechanical winding of an insulated conductor. The first and second coil portions are connected to each other in a way that substantially reduces or eliminates any current-carrying path that is routed radially with respect to the coil. As a result, the split coil produces a uniform magnetic field that enables a more accurate determination of alignment between the coil and the IMD than is available using traditional charging coils.
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Citations
20 Claims
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1. An external charger for wirelessly providing power to an implantable medical device (IMD), comprising:
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a circuit board having a plane; and a charging coil configured to produce a magnetic field to provide power to the IMD, wherein the charging coil comprises a first mechanically-wound coil portion on a first side of the circuit board and a second mechanically-wound coil portion on a second side of the circuit board, wherein the first coil portion and the second coil portion are connected in series, and wherein the first and second coil portions are formed in planes parallel to the plane of the circuit board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An external charger for providing power to an implantable medical device (IMD), comprising:
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a substrate having a plane; control circuitry mounted on the substrate; and a charging coil configured to produce a magnetic field to provide power to the IMD, wherein the charging coil comprises a first portion comprising a first wound conductor on a first side of the substrate and a second portion comprising a second wound conductor on a second side of the substrate, wherein the first wound conductor is electrically connected to the second wound conductor, and wherein the first and second portions are formed in planes parallel to the plane of the circuit board. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification