So ive built up this circuit, as a simple current limiter. After making sure the output is null when the differential is 0, i get different errors depending on the load impedance even when the both loads have the same current flowing through them.
When i connect a 100 Ohm resistor to the output i get a 10mV error at 100mA so the Op Amp outputs 90mV. When i connect a 10 Ohm resistor to the output at 100mA the op amps output reads 80mV.
I have tried two different Opamps, the one on the schematic and a Lm741. I have tested them with both single and split supply but the error pattern still persists. What is happening?