moog sonicV diode ladder

[tomg]

> >I found another moog filter where the oscillation amplitude 
> >increases with frequency like the mini/55. This one is a
> >little different if you're used to looking at the ems ladder.
> 
> Interesting variation of a diode ladder filter.
> I guess it's not the original circuit, though - is it ?
> If not, I'd really like to see the original as well.
> 
> JH.

It's original except for the following....

Voltage summer - 68K was 62K, 6K8 was 6K2
Audio splitter - 120K was 130K 
Res splitter - 47K was 43K - I changed the
resistors because I didn't have the ones called
for, it wouldn't change it much.
All diodes were ca3039 blocks and opamps were 
741s the diff-converter had a 5pf comp cap on it.
I labeled "scale" as peak and "pitch" as init. I 
added the last buffer, just because I had an
extra op-amp.

This one is a keeper! It's like having a ems ladder
that acts like a ms50 ring ,acting like a all-transistor
ladder....hope thats not too confusing. I'll do a pcb
layout over the weekend.

-tg