the nodes are arranged from left to right, from the input to the output, following a ession of cause-and-effect relations through the system.?Branches with direction and gains represent cause-and-effect relationship? Signals travel along branches only in the direction described by the arrows of the branches?A signal traveling along a branch between and is multiplied by the gain of the branch, , so that a signal is delivered at .Р8РExampleРinput:Рoutput:Р9РTipsРSumming points don’t exist anymore. A node is added to represent the variable after a summing point.?A node need be added to represent the variable at a pickoff point.?Special nodes are used to represent input and output variables.Р10РExampleРQ: Please draw the SFG of the circuit on the right. The input is u and the output is uc.РA:
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