arctan()/(π/2) versus tanh() ::
PS! :: this model was created for the fast retrieving of the effect and the response of the particular P-MOS input stage ... the output starts behaving weird near the rails !!!
which means the model cannot be used for conventional simulation purposes !!!
! Update ::
the (simplified-inexact MCP601) model for conventional use (compared against the Ti-s LMV831) ::
? interestingly the Ti's model has a suspicious behaviour on the input exceeding the supply rails ???
? the P-Spice model of the LMV831 accounts the common mode range ending some 1V below the upper rail so it likely suits better the simulation that needs to take into account that limitation . . . my simplified MCP601 model is brought below ::
Listing of the : MCP601SM.cir ::
[EoP]