Electronic Repressilator with Quorum Sensing Feedback

We investigate the dynamics of an electronic ring oscillator, analog of synthetic genetic repressilator (e-Rep), with quorum sensing (QS) feedback. We find: multi-stability of limit cycles (LC) with stable steadystate (SS); LCs with period-doubling and periodhalving; and infinite period bifurcation (IPB) transitions for both increasing and decreasing strength of QS feedback. The noise amplification near the IPB is demonstrated.