METHOD AND APPARATUS FOR IMPLANTABLY ACQUIRING A WIDEBAND SIGNAL
First Claim
1. An apparatus, comprising:
- an implantable device, including;
a physiological sensor adapted to sense a physiological signal having a first frequency component and a second frequency component, the second frequency component carrying information of interest, and the second frequency component being at a higher frequency than the first frequency component;
a continuous-time signal preprocessing circuit, coupled to the physiological sensor to receive the physiological signal, the signal preprocessing circuit configured to output a continuous-time preprocessed physiological signal that represents the second frequency component of the physiological signal; and
a sampling circuit, coupled to the signal preprocessing circuit, configured to sample the continuous-time preprocessed physiological signal to generate a set of samples, the sampling circuit configured to sample at a sampling rate that is lower in frequency than twice the highest frequency of the second frequency component of the physiological signal; and
an implantable or external signal postprocessing module, communicatively coupled to the sampling circuit to receive the set of samples, and configured to process the set of samples to use the information of interest intentionally aliased from the second frequency component of the physiological signal.
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Abstract
This document discusses, among other things, an apparatus and method for implantably acquiring a wideband signal. The apparatus comprises an implantable device including at least one physiological sensor configured to sense physiological signals having a low frequency component and a high frequency component. The implantable device includes a sampling circuit configured to sample at a sampling rate that is lower in frequency than twice the highest frequency of the second frequency component of the physiological signal. The implantable or external signal postprocessing module can be communicatively coupled to the sampling circuit to receive the set of samples, and configured to process the set of samples to use an information of interest intentionally aliased from the second frequency component of the physiological signal.
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Citations
27 Claims
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1. An apparatus, comprising:
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an implantable device, including; a physiological sensor adapted to sense a physiological signal having a first frequency component and a second frequency component, the second frequency component carrying information of interest, and the second frequency component being at a higher frequency than the first frequency component; a continuous-time signal preprocessing circuit, coupled to the physiological sensor to receive the physiological signal, the signal preprocessing circuit configured to output a continuous-time preprocessed physiological signal that represents the second frequency component of the physiological signal; and a sampling circuit, coupled to the signal preprocessing circuit, configured to sample the continuous-time preprocessed physiological signal to generate a set of samples, the sampling circuit configured to sample at a sampling rate that is lower in frequency than twice the highest frequency of the second frequency component of the physiological signal; and an implantable or external signal postprocessing module, communicatively coupled to the sampling circuit to receive the set of samples, and configured to process the set of samples to use the information of interest intentionally aliased from the second frequency component of the physiological signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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implantably sensing a physiological signal having a first frequency component and a second frequency component, the second frequency component being at a higher frequency than the first frequency component, the second frequency component carrying information of interest; implantably preprocessing the physiological signal in continuous-time for extracting a continuous-time preprocessed physiological signal including the information of interest of the second frequency component; implantably sampling the preprocessed physiological signal to generate a set of samples, the sampling using a sampling frequency that is lower in frequency than twice the highest frequency of the second frequency component of the physiological signal, thereby intentionally aliasing to a lower frequency the information of interest from the second frequency component of the physiological signal; and implantably or externally postprocessing the set of samples to use the intentionally aliased information from the second frequency component of the physiological signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus comprising:
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means for implantably sensing a physiological signal having a first frequency component and a second frequency component, the second frequency component being at a higher frequency than the first frequency component, the second frequency component carrying information of interest; means for implantably preprocessing the physiological signal in continuous-time for extracting a continuous-time preprocessed physiological signal including the information of interest of second frequency component; means for implantably sampling the preprocessed physiological signal to generate a set of samples, the sampling using a sampling frequency that is lower in frequency than twice the highest frequency of the second frequency component of the physiological signal, thereby intentionally aliasing to a lower frequency the information of interest from the second frequency component of the physiological signal; and means for implantably or externally postprocessing the set of samples to use the intentionally aliased information from the second frequency component of the physiological signal. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification