9.1.2 Evaluation of a Model's Match

Figure 9.2 shows more detail about the network-model which represents the overall match at various operating conditions of the model under consideration.

The diagram shows how one model is used multiple times within a network-model. Each time it is assigned specific operating conditions and their associated measurements as default settings of dedicated ports of the model. The model could for example represent the accuracy of a device simulation at various values of the electrical potential at the bulk contact. Or it could evaluate the model accuracy for a semiconductor device operating at various temperatures.

One could even go one step further and think of measurements that have been made for different values of temperature for devices with different gate dimensions. Assuming that measurements have been made at 300K and 350K and devices with $0.35\mu\textrm{m}$, $0.6\mu\textrm{m}$, and $1.0\mu\textrm{m}$ were measured, we have to deal with six sets of measurements. The latter case shows that as soon as permutations of operating conditions are present their handling can become cumbersome. The possibility to use models multiply in a network-model keeps such permutations manageable.