railway DFCCIL Executive 2025 Mock Test Control Systems Signal Flow Graph and Block Diagram Mason's Gain Formula
The overall transfer function for the block diagram shown below is given by:
1
\(\frac{{{G_3}\left( {{G_1} + {G_2}} \right)}}{{1 + {G_3}{G_4}}}\)
2
\(\frac{{{G_3}\left( {{G_1} + {G_2}} \right)}}{{1 - {G_3}{G_4}}}\)
3
G1G2 + G3G4
4
(G1 + G2)(G3 + G4)