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Alterable frequency response electrocardiographic amplifier

  • US 4,494,551 A
  • Filed: 11/12/1982
  • Issued: 01/22/1985
  • Est. Priority Date: 11/12/1982
  • Status: Expired due to Fees
First Claim
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1. In an electrocardiographic amplifier including amplifying means, detecting means for detecting low frequency noise above a predetermined magnitude, and gain adjusting means responsive to said detecting means for adjusting the low frequency portion of said amplifying means gain by a fixed magnitude to control said noise, the improvement comprising:

  • said detecting means detects a plurality of low frequency noises and provides one of a plurality of adjustment signals having a duty cycle as a function of the detected low frequency noise; and

    said adjusting means adjusts said low frequency portion of said amplifying means gains to one of a plurality of magnitudes as a function of said adjustment signals, and includes an integrated means connected between the output and the input of said amplifying means in a feedback path and a switch means in series with said integrating means for enabling or disabling said feedback path in response to said adjustment signal to adjust the time constant of said grating means.

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