Hi!
i am learning Op amps. As you told i have took a op amp and simulated it for finding CMRR with closed Loop.
AS per the circuit,
the Output is Vout = Vp(1+R2/R1)-Vn(R2/R1);
So, generally gain is = A = (Vp+(R2/R1)(Vp-Vn))/(Vp-Vn)
For Acm = Vp/Vp = 1 always
for Adm = (Vp+R2/R1(Vp-Vn))/(Vp-Vn);
Even i have simulated with different input combinations , the results are following this relation.
.........
Strange, gain is depending on input voltage what we are applying......