Implantable medical device with backscatter signal based communication
First Claim
1. An implantable medical device comprising:
- a charging coil configured to inductively couple to a first external coil to receive a charging signal to charge a charge storage element;
a circuit coupled to the charging coil, the circuit including a circuit component that, in response to the charging signal being applied to the circuit, generates a backscatter signal having a higher frequency than the charging signal; and
a communication coil orthogonal to the charging coil and coupled to the circuit component, the communication coil configured to inductively couple to a second external coil to communicate the backscatter signal to the second external coil.
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Accused Products
Abstract
An implantable medical device is disclosed that includes a charging coil configured to inductively couple to a first external coil to receive a charging signal to charge a charge storage element of the implantable medical device. The implantable medical device also includes a circuit coupled to the charging coil. The circuit includes a circuit component that, in response to the charging signal, generates a backscatter signal. The implantable medical device also includes a communication coil orthogonal to the charging coil and coupled to the circuit component. The communication coil is configured to inductively couple to a second external coil to communicate the backscatter signal to the second external coil.
451 Citations
23 Claims
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1. An implantable medical device comprising:
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a charging coil configured to inductively couple to a first external coil to receive a charging signal to charge a charge storage element; a circuit coupled to the charging coil, the circuit including a circuit component that, in response to the charging signal being applied to the circuit, generates a backscatter signal having a higher frequency than the charging signal; and a communication coil orthogonal to the charging coil and coupled to the circuit component, the communication coil configured to inductively couple to a second external coil to communicate the backscatter signal to the second external coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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receiving a charging signal at a charging coil of an implantable medical device via inductive coupling of the charging coil to a first external coil of a charging device; rectifying the charging signal and applying the rectified charging signal to a charge storage element of the implantable medical device; applying a backscatter signal, having a higher frequency than the charging signal, to a communication coil of the implantable medical device, wherein the backscatter signal is generated responsive to the charging signal being applied to a component of the implantable medical device and wherein the communication coil is orthogonal to the charging coil; and sending the backscatter signal to an external device by inductively coupling the communication coil to a second external coil of an external device to communicate the backscatter signal to the second external coil. - View Dependent Claims (11, 12, 13)
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14. A charging device comprising:
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a first charging coil configured to couple to a second charging coil of an implantable medical device, wherein the first charging coil is adapted to communicate a charging signal to the second charging coil to charge a charge storage element of the implantable medical device; and a sensing coil that is orthogonal to the first charging coil, the sensing coil configured to detect a backscatter signal, having a higher frequency than the charging signal, from a communication coil of the implantable medical device, the backscatter signal generated by the implantable medical device responsive to the charging signal. - View Dependent Claims (15, 16, 17, 18)
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19. A method comprising:
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applying a charging signal to a first charging coil of a charging device; communicating the charging signal to a second charging coil of an implantable medical device by inductively coupling the second charging coil and the first charging coil, wherein the implantable medical device includes a charge storage element that is charged using the charging signal; and detecting, at a sensing coil, a backscatter signal, having a higher frequency than the charging signal, from a communication coil of the implantable medical device, wherein the sensing coil is orthogonal to the first charging coil, the backscatter signal generated by the implantable medical device responsive to the charging signal. - View Dependent Claims (20, 21, 22, 23)
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Specification