[sdiy] SVF resonance overdrive problem

[Harry Bissell Jr]

They do nothing. They are wired in such
a way so that they do not float (might pick up
noise etc).

H^) harry



--- Dave Manley <dlmanley at sonic.net> wrote:

> Harry Bissell Jr wrote:
> > This circuit is really two independant VCFs...
> > one is a state variable (Odyssey) and the other
> > is a (oops... Moog) ladder LPF (ARP2600)
> I have seen this schematic for the "40235" before
> but never really 
> looked at it. 
> The ladder circuit is different from the 4012 used
> in the 2600.  Reading
> the notes I see it is actually the ladder filter
> from the Odyssey.
> 
> What purpose do the diode wired transistors u4a and
> u5a serve?
> 
> What does u6a do?
> 
> -Dave
>