Split Coil for Uniform Magnetic Field Generation from an External Charger for an Implantable Medical Device
AssigneeBoston Scientific Neuromodulation Corporation
InventorThomas W. Stouffer
Life of this patent
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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.
Claims20
An external charger for wirelessly providing power to an implantable medical device (IMD), comprising:
- a circuit board;
- 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, and wherein the first coil portion and the second coil portion are connected in series.
An external charger for providing power to an implantable medical device (IMD), comprising:
- a substrate;
- 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.
Dependencies are inferred from the claim text.