In order to extract macromodels parameters, Cadence will be used as a schematic entry. The netlist will be used by the tool and simulations can be launched using the Ocean tool from cadence. By making DC, Parametric, and AC simulations, it is possible to extract a linear macromodel of the function (input and output impedance, transfer function) and even model the non linearities.
In a second part it is possible to make parametric simulation, i.e. change a variable in the schematic and plot all characteristics function of this variable.
With this methodology, it becomes possible to optimize, for example the sizes of the transistors, or current sources value easily.