Transmitting coils for neurostimulation
First Claim
1. Apparatus comprising:
- an implantable medical device, comprising a receiving coil; and
a transmitting device, comprising;
a first transmitting coil;
a second transmitting coil disposed with respect to the first transmitting coil such that a shortest distance from an edge of the second transmitting coil to an edge of the first transmitting coil is within 20% of a length of the receiving coil;
a current source; and
a control unit configured to transmit power to the implantable medical device by driving the current source to;
drive a current in a clockwise direction through one of the first and second transmitting coils, anddrive a current in a counterclockwise direction through the other one of the first and second transmitting coils.
1 Assignment
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Accused Products
Abstract
Apparatus and methods are described, including a medical implant that includes a receiving coil. A transmitting device includes a first transmitting coil, and a second transmitting coil disposed with respect to the first transmitting coil such that a shortest distance from an edge of the second transmitting coil to an edge of the first transmitting coil is within 20% of a length of the receiving coil. A control unit is configured to transmit power to the medical implant by driving a current source to drive a current in a clockwise direction through one of the transmitting coils, and drive a current in a counterclockwise direction through the other one of the transmitting coils. Other applications are also described.
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Citations
17 Claims
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1. Apparatus comprising:
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an implantable medical device, comprising a receiving coil; and a transmitting device, comprising; a first transmitting coil; a second transmitting coil disposed with respect to the first transmitting coil such that a shortest distance from an edge of the second transmitting coil to an edge of the first transmitting coil is within 20% of a length of the receiving coil; a current source; and a control unit configured to transmit power to the implantable medical device by driving the current source to; drive a current in a clockwise direction through one of the first and second transmitting coils, and drive a current in a counterclockwise direction through the other one of the first and second transmitting coils. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for transmitting power to a medical implant that includes a receiving coil, the medical implant being implanted at an implantation depth beneath a skin surface, the method comprising:
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placing a first transmitting coil of a transmitting device and a second transmitting coil of the transmitting device adjacent to the skin surface, such that (a) a line connecting a center of the first transmitting coil to a center of the second transmitting coil is generally parallel to a longitudinal axis of the receiving coil, and (b) a shortest distance from an edge of the first transmitting coil to an edge of the second transmitting coil is within 20% of a length of the receiving coil; and using a control unit of the transmitting device, driving a current source of the transmitting device to transmit power to the medical implant by; driving a current in a clockwise direction through one of the first and second transmitting coils, and driving a current in a counterclockwise direction through the other one of the first and second transmitting coils. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification