[sdiy] Moog ladder high pass

[Samppa Tolvanen]

Hi Sean, all.

On 12/29/07, Sean Ellis <tensiontype at hotmail.com> wrote:
> I found this circuit but I know its easier than adding an inverting
> amp/buffer.
> http://www5b.biglobe.ne.jp/%7Ehoushu/synth/Vcfv0212.GIF
> I did it by only adding a few components and moving the input, in a few
> weeks when my gear arrives I can trace the exact method I used.
>

Or would You rather not mess with the filter structure, but add an
original,  inverted signal with filter output?

Samppa