Modeling and Emulation of Extended Memristors: Two-Port Approach Revisited

There have been many attempts to emulate extended memristors as models of real-world devices using Graetz diode bridges with capacitive loads and similar techniques. In this brief, these systems are studied comprehensively as special cases of nonlinear resistive two-ports with reactance loads. The conditions that must be satisfied in order to transform a load into a generic memristor are formulated. It is shown that some hitherto published circuits may not automatically satisfy these conditions, so that in general they may not be extended memristors. The relevant circuit theorems are verified by laboratory experiments.