I. Introduction
The Miller theorem and its derivations provide simple and very powerful tools for the analysis of feedback networks [1]–[4]. For example, the Miller theorem is very useful to quickly find the input impedance of feedback circuits, or to evaluate the expression of the dominant pole due to “Miller” compensation. Moreover, it can be profitably employed to decouple two networks linked by a single feedback element. However, the theorem is valid only for linear circuits, in which the superposition criterion holds.