[sdiy] op amp based filter

[cheater cheater]

Sure, check here: http://www.national.com/ds/LM/LM101A.pdf
Given that there are two compensation inputs, I wonder if you couldn't
even make a 4-pole filter. Just a silly idea.

Cheers,
D.

On Sun, Jul 25, 2010 at 08:38, JH. <jhaible at debitel.net> wrote:
>>> 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.
>