[sdiy] DG413 question

[JH.]

>I believe you can... however...

>I found out the hard way that a wide control voltage input swing
>places large charge injection spikes on the signal, at least on all
>the DG409's I tried.  So my QuadTrapVCO uses extra zeners to bring the
>control voltage down to 3.3 V.


Good to know this, Don. I'll try to keep it mind for other projects.

Here, it's just static.

Time to give some hints about the application:

It's just a phaser. (The phasing part of the Matrix FX.)

But it has a 6-position rotary knob to configure the phaser to
approximate the following topologies:

#1: Not really a phaser, but a voltage controlled 12dB LPF/HPF crossover.
#2: Moog with 4 phasing and 4 resonating stages (positive feedback; unique 
mix for 2nd output)
#3: Moog with 12 phasing and 12 resonating stages
#4. Schulte Compact A with 8 stages , 2-stage negative feedback, and BPF for 
second output
#5: Mutron Bi Phase (2 x 6 stages with positive feedback and opposite 
modulation)
#6: thin stereo chorus mode (2 x 6 stages, negative feedback, negative 
mixing.)

I need 24 electronic switches for this. ;)

JH.