.Modelica.Electrical.Spice3.UsersGuide.Useofsemiconductors

Information

Within the semiconductor devices SPICE3 differentiates between technology parameters and device parameters. Device parameters can be chosen for every single model instance, e.g., the channel length of a transistor. Technology parameters which are specified in a model card (.model) are adjustable for more than one element simultaneously, e.g. the type of transistors. As usually done in Modelica the parameters of the modelcard can be set in a parameter list.

To parametrize more than one model two ways are possible:

1. Apart record:
   For each transistor in the circuit a record with the technology parameters is made available as an instance of the record modelcardMOS. In the example
   "inverterApartRecord" this way is explained more in detail.
2. Extended model:
   For each set of technology parameters a apart model has to be defined. In the example "inverterExtendedModel" this way is explained more in detail.