Parameter-Independent Dynamical Behaviors in Memristor-Based Wien-Bridge Oscillator

Figure 13

Phase portraits of various attractors in the plane under several specified initial conditions of ((0) V, 0 V, 10⁻⁹ V, 0 V). (a) Left-right period-1 limit cycles at (0) = ±0.9 V; (b) left-right period 2 limit cycles at (0) = ±0.6 V; (c) left-right period 4 limit cycles at (0) = ±0.5 V; (d) left-right chaotic spiral attractors at (0) = ±0.32 V; (e) left-right period 3 limit cycles at (0) = ±1.85 V; (f) left-right period 4 limit cycles at (0) = ±1.65 V; (g) left-right period 5 limit cycles at (0) = ±1.35 V; (h) left-right chaotic spiral attractor at (0) = ±1.7 V.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)