Question Why is the output of the op amp designed for this circuit wrong ? !!

Dec 2, 2020
2
0
10
0
  1. Given a fixed value of V1: 0.5V, the value of v2 is adjustable.
  2. When 0.5V<V2<1V (probably this value, there may be a little difference between up and down), the OUT output is my ideal output value.
Problem: When V2>1V, the output value of out is always close to 2.75V,

I don't understand why?
 
Last edited:

ASK THE COMMUNITY