Systematic methodology for applying Mason's signal flow graph to analysis of feedback circuits

Abstract

This paper introduces a systematic methodology for applying Mason's signal flow graph to the analysis of feedback circuits. We demonstrate that the relationships among signals of feedback circuits can be represented in a intuitive and graphical manner utilizing signal flow graphs. Once constructed, the desired solutions can be achieved by simple inspection of the signal flow graph. The Thevenin and Norton equivalent circuits are utilized to model the loading effects of the feedback network in the example circuits presented.