Δ = 1 – Σ loop gains + Σ pairs of non-touching loop gains + extra terms for sets of 3 or more non-touching loops. Δ contains all the loops in the circuit. A loop only affects a path if it touches the ...

The denominator Δ is 1 ­ Sum of loop gains + additional terms for non­touching loops. You can write the gain formula from the SFG. Each input to output path is a term in the numerator. The loops ...