Synchronization of improved chaotic Colpitts oscillators using nonlinear feedback control

被引：26

作者：

Effa, J. Y. ^{[1
]}

Essimbi, B. Z. ^{[1
]}

Ngundam, J. Mucho ^{[2
]}

机构：

[1] Univ Yaounde I, Dept Phys, Fac Sci, Yaounde, Cameroon

[2] Univ Yaounde I, Dept Genies Elect & Telecommun, ENSP, Yaounde, Cameroon

来源：

NONLINEAR DYNAMICS | 2009年 / 58卷 / 1-2期

关键词：

Improved chaotic Colpitts oscillator; Nonlinear feedback; Chaos; Synchronization; Microwave; DESIGN;

D O I：

10.1007/s11071-008-9459-7

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The model and the normalized state equations of the novel version of the Colpitts oscillator designed to operate in the ultra-high frequency range are presented. The circuit is investigated numerically and simulations demonstrate chaos in the microwave frequency range. Typical phase portrait, Lyapunov exponent and Lyapunov dimension are calculated using a piece-wise linear approximation of nonlinear I-V characteristic of the bipolar junction transistor. In addition, the feedback controller is applied to achieve chaos synchronization for two identical improved chaotic Colpitts oscillators. In the frame the nonlinear function of the system is used as a nonlinear feedback term for the stability of the error dynamics. Finally, numerical simulations show that this control method is feasible for this oscillator.

引用

页码：39 / 47

页数：9

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