Could anyone help me out on this, why would an op amp have the curve of X1 with nothing in the circuit, it has a voltage source to the non-inverting input and negative feedback, just like a buffer. I can't figure out why it would have a 1.5v output when the input is 0v, with the shape of the curve I initially thought it was due to rail-rail issue, but that wouldn't explain the initial 1.5v?
The X2 curve is another op amp which has a typical voltage follower curve, but again it seems to have a slight initial voltage and falls just short of 5v.
Any help would be appreciated, I have been going backwards and forwards on this for quite some time now!
*It is a single rail 5v supply