[sdiy] Simulating SSM2164 circuits with LTspice

[Olivier Gillet]

Ah, why do I always find a solution just after posting...

With this:

* SSM2164 VCA cell
.SUBCKT SSM2164 IN OUT CV
* The two transistors in the input's differential pair have the same base
* current, hence the same Vbe. The second transistor is referenced to
* ground so IN is virtually grounded.
V1 IN 0 0
* Models 5k impedance for the CV input
R2 CV 0 5k
* Stability network
R3 IN 1 560
C1 1 0 560p
* Current gain expression
G1 OUT 0 VALUE={-I(V1)*PWR(10, -V(CV) * 1.5)}
.ENDS

I got the 1-pole VCF to work.

I'll let you know if I manage to simulate something more consequent
and will post the files.

Olivier