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METHOD AND APPARATUS FOR IMPLANTABLY ACQUIRING A WIDEBAND SIGNAL

  • US 20080188721A1
  • Filed: 02/07/2007
  • Published: 08/07/2008
  • Est. Priority Date: 02/07/2007
  • Status: Abandoned Application
First Claim
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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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