Monte Carlo Approach Towards Evaluating Random Number Generators Based on Mathematical Schemes Driven from Chua's Circuit

Author(s):  
Kasra Amini ◽  
Aidin Momtaz ◽  
Ehsan Qoreishi ◽  
Sarah Amini ◽  
Sanaz Haddadian

The philosophical nature of randomly generated quantities is widely discussed in the realms of chaos theory. Although, the fundamental premise of the chaos theory does not assume any random behavior in the resulting series and considers them deterministic however highly dependent of the initial conditions of the system, one could address the problem of randomness, by using the output of a chaotic system, as the input of a mathematical function, aiming for the generation of randomly distributed values. For that matter, the voltages of the two capacitors in the classic configuration of a Chua's circuit have been measured. Having defined eight mathematical schemes for manipulating the inputted data set, the current manuscript focuses on the pragmatic and engineering criteria of the resulting data, in terms of randomness, and spectral distributions; hence proposing methods of random data generation. The ranking of schemes has been proceeded through a geometrical manifestation of the Monte Carlo Integration. And the suggested eight schemes are compared with the commercially common timer-based random generators. As the geometrical domain in the Monte Carlo Integration has defined in such a way that the most randomly distributed data set would result in a closer estimation of the number Pi, the suggested scheme working based on 'frequency indicator' is evaluated as the highest-ranked scheme in that regard, with  the estimated numerical value of 3.1424 for Pi.

1995 ◽  
Vol 05 (01) ◽  
pp. 271-273
Author(s):  
M. KOCH ◽  
R. TETZLAFF ◽  
D. WOLF

We studied the power spectrum of the normalized voltage across the capacitor parallel to a piecewise-linear resistor of Chua’s circuit in the “chaos-chaos intermittency” state [Anishchenko et al., 1992]. The investigations included various initial conditions and circuit parameter values without and with external excitation. In all cases we found spectra showing a 1/ω2-decay over more than four decades.


1994 ◽  
Vol 04 (06) ◽  
pp. 1743-1753 ◽  
Author(s):  
LADISLAV PIVKA ◽  
ALEXANDER L. ZHELEZNYAK ◽  
LEON O. CHUA

Empirical recurrent relations, governing the structure of the devil’s staircase in the driven Chua’s circuit are given, which reflect the self-similar structure in an algebraic form. In particular, it turns out that the same formulas hold for both winding and period numbers, but with different “initial conditions”. Some of the finer details such as period-doubling along with numerous coexistence phenomena within staircases of mode-locked states have been revealed by computing high-resolution bifurcation diagrams.


1993 ◽  
Vol 03 (02) ◽  
pp. 259-268 ◽  
Author(s):  
M. DELGADO-RESTITUTO ◽  
A. RODRÍGUEZ-VÁZQUEZ

This paper presents the schematics and layout for a 2.4 µm CMOS prototype of the Chua's circuit. Our design uses VCCSs, realized using the quasilinear region of the transfer characteristics of a differential pair. The global, nonlinear characteristics of this building block are exploited to realize the Chua's diode. The prototype occupies 0.35 mm 2 and consumes 1.6 mW for a symmetrical biasing of ±2.5 v . The HSPICE electrical simulation results of the extracted layout show bifurcation towards a double-scroll Chua's attractor by changing a bias current. The manufacturability of the prototype has been confirmed by Monte Carlo analysis. Measurements from the chip also show bifurcation towards the double-scroll.


2012 ◽  
Vol 532-533 ◽  
pp. 1292-1296
Author(s):  
Guo Yong Zhang ◽  
Jiang Xing

Based on the two-dimensional array of Chua’s circuit, the complex dynamic phenomena of Chua’s circuits with small world connections was simulated. Such networks can be thought of as a model of nonlinear phenomena in spatially extended systems. And this means for understanding complex interactions existing in real systems where separate cells can communicate in various ways. In such small-world networks, the Chua’s circuit is taken as a standard chaotic cell. The results of computer simulation show that the spiral wave patterns could form in certain initial conditions in the presence of the small-world connection. In addition, it is found that the small-world connection could affect the pattern formation greatly.


2009 ◽  
Vol 19 (04) ◽  
pp. 1113-1125 ◽  
Author(s):  
GAURAV GANDHI ◽  
GYÖRGY CSEREY ◽  
JOHN ZBROZEK ◽  
TAMÁS ROSKA

Chaos is a physical and mathematical phenomenon discovered by E. Lorenz in 1963. The first simple electronic implementation had been invented by L. O. Chua in 1984. This electronic circuit, called Chua's circuit was designed for ease of implementation. In the current brief we will explain chaos by building Chua's chaotic circuit using our Chua's circuit kit with inexpensive components. For readers without access to an oscilloscope, this paper proposes the use of a laptop/Personal Computer to capture the voltage waveforms generated from the circuit and plot the waveforms on a computer screen using a virtual oscilloscope software provided by the authors. The kit is available, the software is downloadable.


2015 ◽  
Vol 25 (13) ◽  
pp. 1530037 ◽  
Author(s):  
Ronilson Rocha ◽  
Rene Orlando Medrano-T.

The stability analysis is used in order to identify and to map different dynamics of Chua’s circuit in full four-parameter spaces. The study is performed using describing functions that allow to identify fixed point, periodic orbit, and unstable states with relative accuracy, as well as to predict route to chaos and hidden dynamics that conventional computational methods do not detect. Numerical investigations based on the computation of eigenvalues and Lyapunov exponents partially support the predictions obtained from the theoretical analysis since they do not capture the multiple dynamics that can coexist in the operation of Chua’s circuit. Attractors obtained from initial conditions outside of neighborhoods of the equilibrium points confirm the multiplicity of dynamics in the operation of Chua’s circuit and corroborate the theoretical analysis.


2021 ◽  
Vol 31 (4) ◽  
Author(s):  
Rémi Leluc ◽  
François Portier ◽  
Johan Segers

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