Instead of the very expensive AD534, this board contains two AD633 analog multipliers. The AD633 implements the following transfer function:
f(x+, x-, y+, y-, z) = 0.1 * (x+ - x-) * (y+ - y-) + z
The analog computer project files are hosted at GitHub:
https://github.com/grappendorf/analogcomputer
Subdirectory: Multiplier