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Low noise 60 Hz notch filter circuit

  1. Jun 12, 2009 #1
    Does anyone have a very low noise 60 Hz notch filter circuit that will not attenuate over 100
    or a low noise bandpass from 100 to 20000 hz .
     
  2. jcsd
  3. Jun 12, 2009 #2
    Re: Filters

    Here is a Burr-Brown active do-it-yourself active notch filter at 60 Hz that has separate low-pass, band-pass, and high-pass filters that can be summed in a summing amplifier.
    http://focus.ti.com/lit/an/sbfa012/sbfa012.pdf
     
  4. Jun 13, 2009 #3

    berkeman

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    Staff: Mentor

    Re: Filters

    You want a sharp notch to supress 60Hz and not attenuate 100Hz?

    A better approach might be to eliminate the 60Hz noise coupling first, so that it doesn't show up in your signal channel. And/Or, do something with your signal to move it away from 60Hz (modulation, etc.).

    What is your application?
     
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