The University of Louisiana at Lafayette, March 20-22, 2002.
Copyright © 2002, American Society for Engineering Education
Implementation of the Chua’s circuit and its applications
University of Louisiana at Lafayette, College of Engineering
Lafayette, LA 70504, USA
In this paper the Chua’s circuit is investigated.
This oscillator consists of a passive RLC
block coupled to an active nonlinear resistor (Chua’s diode).
Electronics Workbench (EW)
simulation results showing the existence of chaos are given. The circuit implementation and
experimental results referring to the double scroll attractor are reported.
Applications of the
Chua’s circuit in the area of communication are discussed.
Chaos is a phenomenon that occurs widely in dynamical systems. From educational point of
view this phenomenon was considered to be complex and was never given importance because
there was no simple analysis available, which could help students to delve into this interesting
phenomenon and get some hands on experience. In the current scenario, since the presence of
chaos is being realized in many fields, it is good to have some insight into this phenomenon right
from the undergraduate level. In this paper we develop some intuition into this phenomenon
using a circuit called Chua circuit
and provide necessary circuit theoretical background and
practical details to assist the reader. The criterion for choosing Chua’s circuit is its simplicity,
though simple, it exhibits a variety of chaotic phenomena exhibited by other complex circuits,
which makes it a popular circuit. There are two types of chaotic systems, autonomous and non-
. Chua’s circuit is an autonomous system because there is no external signal injected
into the system.
In this work, we show how to build Chua’s circuit using off-shelf components, describe the
design methodology for constructing the nonlinear resistor and present the experimental and
simulation results of the Chua’s circuit. Efforts are in progress to extend the Chua’s circuit and
attractors. Chaotic phenomenon can be used in real world applications like
secure communication, medical field, fractal theory and many more. This paper discusses in brief
the application of chaos in secure communication
The Chua's circuit (a third-order autonomous, dissipative electrical circuit) has been investigated
thoroughly at the experimental, numerical and analytical levels. This circuit, known for its rich
repertoire of nonlinear dynamical phenomena and has become a universal paradigm for chaos.