I have a circuit that will simulate a device.
The device in question normally communicates by adding/removing resistance from a generated signal, the source of the signal will then measure the voltage difference and interpret that as a message.
In order to simulate it, I need to be able to route the incoming analog signal (1kHz square wave, V1 in below schematic) to different points in the circuit or make it NC. I tried looking for multiplexers, but those I found weren't able to pass the analog signal through. I couldn't find any single-pole triple-throw relays anywhere.
What type of component can I use in place of U1 below to achieve this behavior?
V1 is a PWM signal with a +/- 12V amplitude. It's a control signal which won't be carrying a lot of current (maximum 5nA). I would like to be able to control U1 with a 5V control signal (an arduino or something to that effect)
This is what the "mechanical" counterpart would be: