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Apparatus for filtering cardiac signals

  • US 5,954,660 A
  • Filed: 01/07/1998
  • Issued: 09/21/1999
  • Est. Priority Date: 01/07/1997
  • Status: Expired due to Term
First Claim
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1. A filtering device, having an input and an output, associated to a means for collecting physiological data signals, the filtering device input receiving signals (S1) issued from said means for collecting physiological data signals, and the filtering device output delivering signals (S3) to a means for processing physiological data signals, the delivered signals (S3) spreading, in the frequency domain, over a spectral band between a low cut-off frequency (fo) and a high cut-off frequency, wherein the improvement comprises the collection means comprising a first high-pass filter (12) having a first frequency characteristic (24) and a first cut-off frequency (f1);

  • and a stage of compensation (20) comprising a means of accentuation having a second frequency characteristic (32) that is inverted as compared to the first frequency characteristic of the first high-pass filter, wherein the first cut-off (f1) frequency of the first high-pass filter is greater than the low cut-off frequency (fo) of the spectral band.

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