I am using TSMC 0.18um design kit, and I noticed that some transistors (in the tsmc18rf) library are named "nmos2v_mis" which are the mismatch model of the transistors.
My question is, when to use these transistors in simulation and what is the expected difference in results ??
use it when you want to simulate a real world situation. Parameter mismatches are taken into acount when simulating, so results will be quite different from the ideal situation.