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Noise rejecting detector for biomedical signals

  • US 4,899,760 A
  • Filed: 06/15/1987
  • Issued: 02/13/1990
  • Est. Priority Date: 06/15/1987
  • Status: Expired due to Term
First Claim
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1. A biological signal detector, comprising:

  • means for obtaining an electrical representation of a plurality of biological signals related to the operation of a human heart, each said signal comprising a direct current component, an alternating current component at a first frequency, and an alternating current noise signal at a second frequency, said second frequency being substantially higher than said first frequency, said electrical representation of each of said biological signals being defined by a plurality of pulse amplitude signals having predetermined time intervals;

    means for combining said pulse amplitude signals to produce a multiplexed signal comprising an ordered succession of pulses representing each of said biological signals; and

    means for demultiplexing said multiplexed signal to obtain a representation of each of said respective biological signals, comprising means for storing a value corresponding to a predetermined portion of the amplitude of the individual pulse amplitude signals during each said time intervals, said means for storing being nonresponsive to said noise signal at said second frequency.

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