[sdiy] op amp based filter

[JH.]

>> Using the compensation cap as an *additional* filter pole for an opamp 
>> that
>> is already connected as a LPF may be interesing.
>> Eventide had a clever high-order LPF that only used one opamp. (A LM301 =
>> LM101, actually.)
>> I have used that circuit in my SOST Flanger, if you want to take a look.
>
>Thanks. Found it. They've directly taken it from the N01 app note for N = 
>1..3.

That's most interesting!
Do you have a link to that App Note?

JH.