[sdiy] Filter slopes

Neil Johnson neil.johnson71 at gmail.com
Mon Jun 11 10:32:22 CEST 2018

Hi Ian,

> Several of
> the pictures looked like bandpass filter responses with different slopes on
> each side. How would I go about doing that? Is the slope determined by the
> gain of the op amp in an active filter? If it's that easy, would it be a
> highpass filter followed by a lowpass filter each with their own gain
> settings?

Olivier's paper has some good insight into how to achieve what you're after:

For a practical implementation hunt out the Oberheim multimode filter circuit:

See page 4.


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