Optical telemetry of data and power for wireless biomedical sensors and actuators
First Claim
1. An apparatus for providing data communications to and from a location within a body cavity, the apparatus comprising:
- a internal transmitter receiving a first data stream, the internal transmitter configured and arranged to asynchronously modulate the first data stream and to provide as output a first optical signal carrying the asynchronously modulated first data stream; and
an external receiver configured and arranged external to the body cavity, the external receiver having an optical input optically coupled to the internal transmitter output, wherein the optical input of the external receiver receives the optical signal from the internal transmitter, the external receiver further configured and arranged to asynchronously demodulate the optical signal and to provide as an output at least one signal indicative of the first data stream.
1 Assignment
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Accused Products
Abstract
An apparatus and corresponding method for providing data communications to and from a location within a body cavity in which an internal transmitter receives a first data stream from an in vivo sensor, electrode, or transducer. The internal transmitter is configured and arranged to asynchronously modulate the first data stream and to provide as an output a first optical signal carrying the asynchronously modulated first data stream. The apparatus further includes an external receiver that is configured and arranged external to the body cavity such that an optical input to the external receiver is optically coupled to the internal transmitter output and receives the optical signal therefrom. The external receiver asynchronously demodulates the received optical signal and provides as an output at least one signal indicative of the first data stream.
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Citations
25 Claims
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1. An apparatus for providing data communications to and from a location within a body cavity, the apparatus comprising:
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a internal transmitter receiving a first data stream, the internal transmitter configured and arranged to asynchronously modulate the first data stream and to provide as output a first optical signal carrying the asynchronously modulated first data stream; and
an external receiver configured and arranged external to the body cavity, the external receiver having an optical input optically coupled to the internal transmitter output, wherein the optical input of the external receiver receives the optical signal from the internal transmitter, the external receiver further configured and arranged to asynchronously demodulate the optical signal and to provide as an output at least one signal indicative of the first data stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21)
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19. An apparatus for providing data communications to and from a location within a body cavity, the apparatus comprising:
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a internal transmitter receiving a first data stream, the internal transmitter configured and arranged to asynchronously modulate the first data stream and to provide as output a first optical signal carrying the asynchronously modulated first data stream; and
at least one overcoat layer encapsulating the internal transmitter, at least one overcoat layer providing the encapsulated internal transmitter with a density substantially matching the density of the body cavity.
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22. An offset cancellation stage for reducing low frequency and DC offset voltages in an electronic device including an input amplifier having a first input implanted within a body cavity, providing a first data stream as telemetry from a location within a body cavity, the first data stream provided by a first electronic module, the offset cancellation stage comprising:
a feedback circuit having the first input of the input amplifier coupled to one input of a first difference module, the output of the difference module provided to the input amplifier having a first transfer function, the input amplifier providing as an output signal, a second difference module having as a first input the output signal and as a second input a reference signal coupled thereto, the second difference module providing the difference between the output signal and the reference signal as an input to a feedback module having a second transfer function, the feedback module providing a feedback signal to the second input of the first difference module wherein the output of the first difference module is the difference between the first data stream and the feedback signal, wherein the second transfer function is selected to remove low frequency and DC offset components from the first data stream. - View Dependent Claims (24, 25)
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23. A method for providing data communications to and from a location within a body cavity, the method comprising the steps of:
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providing at least one internal electrical signal;
encoding at least one internal electrical signal;
modulating an internal optical transmitter to provide an optical signal in an asynchronous modulation scheme according to the encoded at least one internal electrical signal;
transmitting the modulated optical signal through the body cavity;
receiving the modulated optical signal externally to the body cavity by an external optical receiver;
demodulating the received optical signal to provide an external demodulated electrical signal; and
decoding the external demodulated electrical signal to provide an external electrical signal representative of the internal electrical signal.
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Specification