Nonautonomous pulse-driven chaotic oscillator based on Chua´s circuit

A novel nonautonomous chaotic oscillator based on the passive structure of Chua´s circuit is proposed. Unlike most of the available members of this class of chaotic oscillators, the proposed circuit is driven by a periodic bipolar pulse-train rather than by sinusoidal excitation. This results in equilibrium points which have fixed positions in space. The circuit employs self feedback via a single comparator, which is the only nonlinear device involved. The output of this comparator is a chaotic bipolar pulse-train. A mathematical model which captures the behavior of the circuit is derived and experimental results are presented. A variant structure with an alternatively excited node is discussed.