In this paper an approach to the synchronization of chaotic circuits has been reported. It is based on an optically programmable logic cell and the signals involved are fully digital. It is based on the reception of the same input signal on sender and receiver and from this approach, with a posterior correlation between both outputs, an identical chaotic output is obtained in both systems. No c...

Abstract:In this paper, under some assumptions a nonlinear controller based on differential geometry theory of nonlinear control system and pole-assignment method is designed, and applied to synchronize output signals of high dimensional chaotic system. Using the method, we can synchronize output signals formed by linear or nonlinear composition of single or multiple state variables of the chao...

A detailed description and analysis on the behaviour of a bipolar junction transistor in chaotic operation is presented. Bipolar Junction Transistors (BJTs) are basic ingredients of chaotic Colpitts oscillators, which aim at generating chaotic signals for secure communications. The high frequency operation of the chaotic oscillators is a challenging issue due to the parasitic capacitance of the...

This paper reports on the design of a subthreshold-CMOS chaotic oscillator based on Chua's circuit. The circuit is autonomous and generates chaotic signals from three state variables in a manner analogous to a Chua circuit. Previous CMOS IC versions of the Chua circuit operate above threshold and make use of capacitors over 200 times larger than the subthreshold design. Also, this design is bas...

In the process of designing and constructing switching power converters, chaotic operations are often observed intermittently between long periods of regular operations. In practice, such intermittent chaotic operations can be eliminated by incorporating appropriate design measures to combat interference of spurious signals. In this paper, we explain the mechanism that causes “intermittent” cha...

This paper reports on the design of a subthreshold-CMOS chaotic oscillator based on Chua's circuit. The circuit is autonomous and generates chaotic signals from three state variables in a manner analogous to a Chua circuit. Previous CMOS IC versions of the Chua circuit operate above threshold and make use of capacitors over 200 times larger than the subthreshold design. Also, this design is bas...

Nonlinear dynamic signal processing is attracting several researchers owing to its complex behavior which may be deterministic at macro level and may be in order but unruly behavior with respect to time is difficult to understand and interpret. EEG signals fall under such categories. Prediction of seizure in EEG is a challenging task. For this several prediction methodologies have been in use f...

| Nonlinear discrete-time dynamic systems with chaotic behaviour are known to generate noise-like signals which have a power density spectrum distributed over a certain frequency range (broadband signals). This paper deals with the systematic design of such systems which generate signals with prescribed probability density function (pdf) and power density spectrum (pds).

electro encephalography is one of the reliable sources to detect sleep onset while driving. in this study we have tried to demonstrate that sleepiness and alertness signals are separable with an appropriate margin by extracting suitable features. so first of all we have recorded eeg signals from 10 volunteers. they were obliged to be sleep deprived about 20 hours before the test. we recorded th...

BACKGROUND The theory of chaos proves a deterministic mechanism of induction of multiple complex processes previously thought to be random in nature. This research explains how these complex processes develop. The aim of the study was to test the hypothesis of the chaotic nature of myocardial electrical events during ventricular tachycardia (VT) and ventricular fibrillation (VF). METHODS Orig...