Improved implementation of Chua´s chaotic oscillator using current feedback op amp

Author

Elwakil, A.S. ; Kennedy, M.P.

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. Coll. Dublin, Ireland

Volume

47

Issue

1

fYear

2000

fDate

1/1/2000 12:00:00 AM

Firstpage

76

Lastpage

79

Abstract

An improved implementation of Chua´s chaotic oscillator is proposed. The new realization combines attractive features of the current feedback op amp (CFOA) operating in both voltage and current modes to construct the active three-segment voltage-controlled nonlinear resistor. Several enhancements are achieved: the component count is reduced and the chaotic spectrum is extended to higher frequencies. In addition, a buffered and isolated voltage output directly representing a state variable is made available. Based on a linearized model of Chua´s circuit, the useful tuning range of the major bifurcation parameter (G) and the expected frequency of oscillation, are estimated

Keywords

Chua´s circuit; bifurcation; chaos generators; circuit tuning; feedback amplifiers; operational amplifiers; Chua chaotic oscillator; active three-segment nonlinear resistor; bifurcation parameter; buffered isolated voltage output; chaotic spectrum extension; component count reduction; current feedback op amp; current mode; linearized model; oscillation frequency; tuning range; voltage mode; voltage-controlled nonlinear resistor; Chaos; Chaotic communication; Circuits; Diodes; Feedback; Frequency estimation; Operational amplifiers; Resistors; Voltage; Voltage-controlled oscillators;

fLanguage

English

Journal_Title

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on

Publisher

ieee

ISSN

1057-7122

Type

jour

DOI

10.1109/81.817395

Filename

817395