Improvements in analog signal processing applications require the selection of adequate active devices. However, each kind of active device offers different port-characteristics. For instance, the parasitic elements play an important role in selecting the best one for a given application. Symbolic nodal analysis is a useful tool to derive electrical characteristics of analog circuits, but compact models for the active devices are required to generate small matrices and analytical expressions. That way, this paper shows the usefulness of using pathological elements to generate behavioral models including dominant parasitic elements. The proposed approach is useful for the selection of active devices in analog design and synthesis procedures.
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