As a consistency check on your results, mentally remove R4 from the bridged-T circuit and compute a Thevenin equivalent for the remaining circuit. Then compute the current in R4 if it were connected to your Thevenin equivalent and show that you obtain the same I4, Figure 15-3 The ratio of output voltage to input voltage for a network is called the transfer function of the network. Find the transfer function for the network shown in Figure 15-7 by solving the loop equations (written in the box) for the paths shown. All resistors are equal. Notice that is given by RI . Then solve for the ratio of .