Nonautonornous 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. Also, a version of the circuit with a practical realization of the driving pulse generator is considered and a variant structure with an alternatively excited node is discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.