I'm sorry. That was a little vague.
The first answer, under your question was to it, and my last post was in response to KrisBlueNZ.
My + and - 2.5V supplies are relative to the ground on the one side of R4, so Vin is actually changing the value of the supplies. I should have included my power...
They do.
Thank you.
I'm injecting voltage at my ground through the one resistor at the non-inverting input of the difference amp, and changing my supply voltage.
I don't know how I could prevent that easily.
The input is a separate bench power supply. I'm using a simple 2-resistor divider to get +2.5V, -2.5V, and GND from a bench supply at 5V. Those are the supplies and the one ground that are marked in the image.
I'm then connecting a separate bench supply to Vin, and measuring Vout relative to...
First of all, thank you all for such a nice forum. A lot of great info here.
I have a very simple OpAmp circuit that consists of two opamps. One in difference amp configuration and another in voltage follower. (Attached)
The idea is an isolated voltage reading from Vin. I built a simple...