ia nonlinear controller is proposed for chaos generation in an arbitrarily
given lower-order linear autonomous system. The only nonlinearity in the co
ntroller is a piecewise quadratic function. of the form g(v) = v/v/. A gene
ral two-dimensional linear autonomous system is used for illustration. Bifu
rcation analysis and chaos verification sire given by numerical continuatio
n techniques and the Shil'nikov theorem. Both computer simulation and circu
it implementation demonstrate the chaotic dynamics generated by this simple
anti-controller.