I. Introduction
Much attention has been focused on chaotic systems by the circuits and systems community over the last two decades [1]. Application areas have included secure communications [2] and information processing [3]. Recently hyperchaotic systems have been a topic of increased interest [4]. Hyperchaotic systems possess at least two positive Lyapunov exponents as compared to the more relaxed requirement of a single positive Lyapunov exponent for a chaotic system.