Current-tunable chaotic jerk oscillator

A new chaotic jerk circuit has been realised using a current-tunable technique. Based on traditional nonlinearity of a signum function, newly smooth transitions from a balanced double-scroll chaotic jerk attractor to an unbalanced double-scroll and eventually to either a left-half or a right-half single-scroll chaotic jerk attractor are experimentally revealed using either a negative or a positive adjustable current source I₀, respectively. Current-tunable bifurcations are demonstrated. A plot of the largest Lyapunov exponent resembles a symmetrically balanced image centred at I₀ = 0.