hierarchical system parameters and spice primitives

All,

When using any of the spice primitives defined in Annex E, should these be 
able to handle the hierarchical system parameters ($mfactor, $xposition, 
etc.) given that they are automatically added to every module? Linear 
components can be easily handled, but things are definitely different for 
more complex built-in components such as MOSFETs and BJTs which often have 
their own handling of the multiplicity factor, for instance for noise 
calculations.

Should the connection between $mfactor and the models own multiplicity 
factor be made by the user or should it be handled automatically, i.e. 
similar to the handling of a Verilog-A implementation of the same model.

Should it be possible to use aliasparam for the hierarchical system 
parameters, for instance to map $mfactor to a model that already has a 
similar parameter? As an example, the Verilog-A code of the PSP model 
already contains the MULT parameter which is equivalent to $mfactor.

Regards,
Marq


Marq Kole
Competence Leader Analog Simulation, Philips ED&T