A Memristive Hyperchaotic System without Equilibrium

Figure 1

Hysteresis loops of the proposed memristive device (2) driven by a sinusoidal stimulus (3) when (a) 𝑈=1, 𝑤_𝑚(0)=0, and varying frequency 𝑓, (b) 𝑓=0.2, 𝑤_𝑚(0)=0, and changing input amplitude 𝑈, and (c) 𝑈=1, 𝑓=0.2, and using different initial states 𝑤_𝑚(0).

(a)

(b)

(c)