[sdiy] Moog-type highpass filter

[Dave Manley]

Damian wrote:
> I wasn't really even talking about overdrive - just about having
> enough AC peak-to-peak current so that it can modulate the
> transistors' resistance in a significant way. I understand that
> 'normally' the AC signal's peak to peak current difference is orders
> of magnitude lower than the swing of the 'control' DC current.
>   
Damian,

You seem very interested in this as you've brought it up before, why 
don't you model the ladder part of the filter in LTSpice, and let the 
group know how much signal input voltage you'd need to significantly 
affect the corner frequency set by the control voltage.

It's an interesting question.

-Dave