Realization of Chua’s circuit using VDBA based nonlinear resistor and inductor simulator

A Voltage Differencing Buffered Amplifier (VDBA) based autonomous Chua’s chaotic circuit is suggested in this work. An active circuit topology for non-linear resistor is proposed which is a constituent of Chua’s circuit. It employs two VDBAs and two resistors to provide desired breakpoints. Also, the area consuming passive inductor has been implemented using VDBA, which in turn has been designed using macromodel of Current Feedback Operational Amplifier (CFOA), to provide a different alternative to the VLSI based integration problem of the chaotic circuits. A comparison with the existing designs shows a significant reduction in area in terms of passive components with the suggested design. The operation of the proposed Chua’s circuit is shown with LTspice design environment and the simulations obtained are in fair inclination with its theory.