Draw the signal flow graph Assignment of values to the branches Assignment of input and output node Solve the signal flow graph to get the transfer function Listing all forward paths, individual loops ...

The equation is formed from incoming branches. A node adds the incoming signals to create the node value. In the example, Vout is created by adding the signal from Vin and the Signal from V1. Vout = ...

Author’s note: This article shows how to derive circuit gain equations via a signal flow graph. With practice you may be able to write a gain equation by locating signal paths and loops in the ...