Implantable medical device and charging system employing electric fields
First Claim
1. An implantable medical device, comprising:
- a battery;
a wire configured to receive a wireless transmission of an electric field, wherein the wire is additionally configured to provide stimulation to a patient'"'"'s tissue at an electrode coupled to the wire;
a first rectifier circuit configured to convert the electric field received at the wire to a first DC voltage;
a coil configured to receive a magnetic field;
a second rectifier circuit configured to convert the magnetic field to a second DC voltage; and
selection circuitry configured to select either the first DC voltage or the second DC voltage to charge the battery.
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Accused Products
Abstract
An implantable medical device and external base station system are disclosed. The external base station can provide a passive electric field to power the implant, or to charge its battery. The base station may also power or charge using magnetic fields under certain circumstances. The Implantable medical device may comprise an implantable neurostimulator having a number of electrode leads extending from its body. One or more of the electrode leads can comprise the antenna for receiving the electric field from the base station, and resonance in that antenna can be rectified to provide the power for recharging the battery. Although the E-field provided by the base station does not provide as much power for recharging as does other traditional charging techniques, it can occur passively and over longer distances to allow the patent'"'"'s implant to be recharged when in relative proximity to the base station.
70 Citations
13 Claims
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1. An implantable medical device, comprising:
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a battery; a wire configured to receive a wireless transmission of an electric field, wherein the wire is additionally configured to provide stimulation to a patient'"'"'s tissue at an electrode coupled to the wire; a first rectifier circuit configured to convert the electric field received at the wire to a first DC voltage; a coil configured to receive a magnetic field; a second rectifier circuit configured to convert the magnetic field to a second DC voltage; and selection circuitry configured to select either the first DC voltage or the second DC voltage to charge the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification