The loop-based algorithm provides accurate stability information for single-loop circuits and
multi-loop circuits in which a probe component can be placed on a critical wire to break all
loops. For a multi-loop circuit in which such a wire may not be available, the loop based
algorithm can be performed only on individual feedback loops to ensure they are stable.
Although the stability of all feedback loops is only a necessary condition for the whole circuit
to be stable, the multi-loop circuit tends to be stable if all individual loops are associated with
reasonable stability margins.