/diy/ - Do It Yourself

>>1706441
>but are they analog?
Uh, yeah, they can be. They aren't much nowadays, but they used to be exclusively analog electronics.
This stuff goes back to the days of analog computers.
I'm sure you know this, but op-amps can be made to create a multiply by constant, integrator, differentiator, summing, and difference modules.
This covers most of the nodes found in a data flow diagram.
If you need it to be time-discrete, just put a sample and hold. If you need a delay, use multiple sample and holds.
The only module that can't be made with an op-amp is a 4-quadrant multiplier. For that you can use a Gilbert Cell or an Operational-Transconductance Amplifier.