Positive feedback is a ubiquitous regulatory motif that allows systems to convert graded inputs into decisive, all-or-none outputs. Onn Brandman et al. [1] simulated the performance of the multiple interlinked loops, and showed that linking fast and slow positive feedback loops creates a dual-time switch that is both rapidly inducible (due to the fast positive feedback loop) and resistant to no...

in this paper, construction properties of branches in the root locus of a positive feedback system whose loop transfer function is not strictly proper have been investigated. we have introduced and proved the formulations for calculating the number of branches passing through infinity, point of intersection of the asymptotes on the real axis, and angle of these asymptotes with positive directio...