Suppose I have a noiseless Signal, which has been filtered with a 2nd order Bessel low pass. I know the filter's transfer function. How can I obtain the unfiltered signal? Thanks!

  • \$\begingroup\$ Why is this question different to the one you posted a few minutes ago? \$\endgroup\$
    – Andy aka
    Dec 8, 2016 at 10:14

1 Answer 1


If you know the actual transfer function of the filter then passing the signal through an amplifier with a filter with transfer function equivalent to the original filter in the negative feedback path 'should' return the original signal, subject to any non-idealities encountered along the way.

Written late in a too long day.
Hopefully it will seem as correct in the morning as it does now :-).


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