Synchronization of chaotic oscillators in
particular became popular when Pecora and
Carroll published their observations of
synchronization in unidirectionally coupled chaotic
systems [13]. Their results were remarkable since
chaos can be seen as a form of instability while
synchronization implies stability of the error
dynamics [12]. The research in synchronization of
couple chaotic circuits is carried out intensively and
some interesting applications such as cryptography,
communications with chaos have come out of that
research [14].