Low noise 60 Hz notch filter circuit

[m718]

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 .

 

[Bob S]

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

 

[berkeman]

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 .

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?