Generation of active inductor circuits

This paper proposes a novel systematic method of generating active inductor circuits. It is a graph-based approach that consists of building a flow-graph of a structure without inductors, whose transfer function is equivalent to the impedance or the admittance of an inductor, and then generating the equivalent circuit with only RC-elements, controlled sources and, in some cases, "switches". The "switches" are controlled by the type of the graph (a voltage graph or a current graph). In the next step, "switches" are replaced by nullators and norators. In the last step each nullator-norator pair (nullor) is replaced by an appropriate active circuit.