Design And Realization Of Multi-scroll Chaotic Circuit Based On OTA

Chaos is a special non-linear phenomenon,sensitivity to initial value distinguishes it from other phenomena.For a long time,Chaos phenomenon has been considered harmful and is keen to avoid,until the chaotic attractors are discovered by accident,at that time,the enthusiasm of studying Chaos starts.With the application of Chaos in electronic information and communication becoming wider and wider,designing chaotic circuit and generating chaotic signal have become a hot spot of research in recent years.And compare to double scroll chaotic attractors,multi-scroll chaotic attractors have more advantages because of its complex dynamic characteristics and safety in the key parameters,Therefore,researching and designing multi-scroll chaotic circuit are important for development of secure communication in future.important practical significance.Based on the background,the following work has been done in this paper:1.Single direction multi-scroll chaotic circuit is designed.Based on Chua’s circuit,the dynamic behavior of Chua’s circuit is studied.According to nonlinear characteristics of the Chua’s circuit,Chua’s double scroll chaotic circuit based on OTA was implemented;and based on Chua’s equation,transposition of polymerization is done to change the position of saddle-focus equilibrium points with index-2,so scroll area and key area alternately repeatedly,then the single direction multi-scrollchaotic attractors are generated.Chaotic attractors generated in this way,the number is large and all rolls are almost at the same size.2.Grid multi-scroll chaotic circuit is designed.Its basic principle is as follows:firstly,dimensionless state equation of Grid multi-scroll chaotic system is analyzed,and nonlinear equation is studied,then based on nonlinear equation,function circuit based on OTA is presented.Thirdly,function circuit is introduced to multi-scroll chaotic circuit system,and a new grid multi-scroll chaotic system is constructed.Finally the comprehensive analysis and circuit simulation are done,and multi-scroll chaotic attractors at any combination are generated.The simulate results are in accord with theoretical analysis,the feasibility of the circuit is confirmed.In this paper,based on Chua’s circuit and Jerk circuit,ways to generate multi-scroll chaotic attractors based on OTA are researched,single direction multi-scroll chaotic attractors and grid multi-scroll chaotic attractors are generated by expanding saddle-focus equilibrium points with index-2 from horizontal and vertical.A chaotic circuit based on a new kind component is offered.