Hi, all. Below picture is a basic test setup of monte-carlo simulation for the PDK that I'm currently using. In order to investigate mismatch characteristics, I'm using nch_lvt_mac devices that models mismatch characteristics of low-Vt NMOS.

Is there anyone who knows the accurate meaning of 'Mismatch_Sigma' parameter in the left 'Edit Object Properties' subwindow? I guess this is some sort of factor that is multiplied to the variance of mismatch parameter because when I put 3 as 'Mismatch_Sigma', the std becomes three times larger than the case when 'Mismatch_Sigma' is 1(default).