I am under internship where my guide is asking to model slew rate and cmrr my making the internal structure of opamp isl70444. How can I enhance my three stage model of opamp for this modelling?

 

I examined your code through my crystal ball and here is my recommendation:

Insert the following code after line 137 in module “OutputStage.c”;

if (abs((dV / dt)) > SlewRate)
dV = sign(dV) * SlewRate * dt;

 

Don't see how you can model slew rate with only passive components(?).