eldo_user

Statistical Experimental Design and Analysis
Reference Factors for the DEX Analysis
P(parameter_name)
This is equivalent to:
parameter_name
Consider the situation:
.PARAM param4_global=value
The global parameter param4_global has no random variations. It is therefore a deterministic
(control) parameter and can only be referenced with these equivalent statements:
.PARAMDEX param4_global [CTRL/] ...
.PARAMDEX P(param4_global) [CTRL/] ...
Model Parameter Selector Specification
The EM(.,.) and M(.,.) selectors enable random variables that are associated with model
parameters to be referenced.
The syntax of the M(.,.) selector is:
M(model_name, model_parameter)
This references the random variable that is associated with the model parameter
model_parameter of the model model_name. Its distribution is specified in the definition of the
parameter. It will always be associated with a parameter with LOT variations, since it refers
globally to a model parameter.
The syntax of the EM(.,.) selector is:
EM(device_name, model_parameter)
This references a random variable that is associated with the model parameter model_parameter
of the device device_name. Its distribution is specified in the definition of the parameter. It will
always be associated with a model parameter that is associated with a specific instance, hence it
means that this parameter must have DEV or DEVX variations.
Consider a model MOD1 with two parameters:
* MODEL DEFINITION
.MODEL MOD1 ...
+ param1_model=value DEV=value param2_model=value LOT=value ...
and a device named MA:
MA ... MOD1 param1_inst=value ... param1_model=value param2_model=value
...
Eldo® User's Manual, 15.3 563