The Feedback Decomposition Theorem: The evolution of Miller's Theorem

Abstract

A theorem for the simplification of feedback amplifiers, under the name ‘Feedback Decomposition Theorem’ (FDT) is introduced, conceived during the quest for a catholic Miller's Theorem. Its concept and applicability overcomes the application restrictions of Miller's Theorem, confronting issues such as the bilateral or unilateral character of the basic amplifier and forward or reverse signal flow direction. It is based on a generalized two-port modelling formulation and performance evaluation approach of feedback amplifiers. A readily identifiable usefulness as a simple, comprehensible feedback analysis tool is finally discussed.