Figure 1.2 illustrates the signal flow graph (SFG) of a control system. Determine its transfer function. 1)

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Figure 1.2 illustrates the signal flow graph (SFG) of a control system. Determine its transfer function.


1) \(\frac{G_{1}+G_{2}}{1-G_{2} H+G_{1} G_{2}}\)
2) \(\frac{G_{1}+G_{2}}{1+G_{2} H-G_{1} G_{2}}\)
3) \(\frac{G_{1}+G_{2}}{1-G_{2} H}\)
4) \(\frac{G_{1}+G_{2}}{1+G_{2} H}\)

Figure 1.2

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