Comparison of the Methods of Graphical Solution of Symbolic Sensitivity

Signal-flow graph (SFG) technique is very useful tool for the hand analysis of small and medium-size networks and/or subnetworks of large systems. Last days the SFG´s have been effectively used for the sensitivity solutions. There is described comparison between methods for derivation transfer function: nullor modified Coates flow graph symbolic analysis and the two graph method for symbolic analysis. There is shown graph modified by nodal voltage method with intermediate numeric step, as well. As is given, in some cases the two graph method thanks its clarity is more useful.