Hello, I am a student working on a project that requires the use of a differential amplifier. I am trying to measure the active current of a micro controller.
Below is the schematic of a circuit I created to test out the differential amplifier. In the real circuit the 100 Ohm resistor would be exchanged by the micro controller.
I used Multisim to simulate it and it worked as intended. But when I tried it physically I got undesired values at the output. I would get 0.5V at the output even though the differential input was about the same as the simulation.
I have checked the connections multiple times and still don't see what could be causing the problem.
For the op-amps I am using the LM324-N from TI: http://www.ti.com/lit/ds/symlink/lm2902-n.pdf
I am supplying 9V to the LM324-N, I am using op amp 1 2 and 4, leaving 3 unused.
Could it be a problem with the Input Common-Mode Voltage?
Any help is appreciated!
Below is the schematic of a circuit I created to test out the differential amplifier. In the real circuit the 100 Ohm resistor would be exchanged by the micro controller.
I used Multisim to simulate it and it worked as intended. But when I tried it physically I got undesired values at the output. I would get 0.5V at the output even though the differential input was about the same as the simulation.
I have checked the connections multiple times and still don't see what could be causing the problem.
For the op-amps I am using the LM324-N from TI: http://www.ti.com/lit/ds/symlink/lm2902-n.pdf
I am supplying 9V to the LM324-N, I am using op amp 1 2 and 4, leaving 3 unused.
Could it be a problem with the Input Common-Mode Voltage?
Any help is appreciated!