I'm experimenting with a real (imperfect) LM358P op-amp on a breadboard and configured it in inverting mode to see how it performs with open-loop gain.
While feeding it a 1hz 1.3mV Peak-to-Peak AC sine wave, it saturates to Vcc as much as an LM358P can, and the output almost looks like a square wave. At 1.2mV input, it doesn't output anything.
But when the same op-amp is configured in inverting mode, the same behavior happens at 0.5mV.
From what I understand, a perfect op-amp should behave the same way in both inverting and non-inverting configurations.
So my question is what is causing this difference? Offset voltage?
And why does the op-amp jump from no output to full saturation with nothing in between in open-loop?
While feeding it a 1hz 1.3mV Peak-to-Peak AC sine wave, it saturates to Vcc as much as an LM358P can, and the output almost looks like a square wave. At 1.2mV input, it doesn't output anything.
But when the same op-amp is configured in inverting mode, the same behavior happens at 0.5mV.
From what I understand, a perfect op-amp should behave the same way in both inverting and non-inverting configurations.
So my question is what is causing this difference? Offset voltage?
And why does the op-amp jump from no output to full saturation with nothing in between in open-loop?