In this paper, an inductorless CMOS realization of Chua’s circuit [IEEE Trans. Circ. Syst. – I 1985;32:798] is presented. The circuit is derived from the dimensionless form of Chua’s circuit and can generate Rossler or double-scroll attractors by changing a single capacitor’s value. Variables are represented in the current domain to facilitate adding or subtracting variables. New Gm-C representation of the Chua diode as well as the Chua circuit are presented. The circuit can operate from supply voltage as low as ±1.5 V. Transistor-level simulation results using PSpice in 0.5 ?m Mietec process are presented. © 2003 Published by Elsevier Science Ltd.
MOS realization of the conjectured simplest chaotic equation
This paper presents a general block diagram of a third-order linear differential equation using current mode techniques. The realization of the conjectured simplest chaotic equation of Elwakil and Kennedy based on G m – C technology is given. The metal oxide semiconductor circuit is composed of 20 transistors and three grounded capacitors, can operate from a supply voltage as low as ± 1.5 V, and covers a very wide range of frequencies. PSpice simulation results using 0.5 ?m Mietec technology are given. A numerical solution is also included to verify the circuit operation.
MOS realization of the double-scroll-like chaotic equation
This brief presents a new chaotic circuit based on Gm-C integrators. The circuit realizes the double-scroll-like chaotic equation presented in [1], [2]. The mentioned equation describes double-scroll dynamics with a simple mathematical model. The proposed circuit uses a current-mode technique that is suitable for integrated circuit implementation and high-frequency operation using low supply voltage. A general block diagram is presented based on Gm-C integrators. Its realization using MOS transistors and three grounded capacitors is also given. Simulation results to demonstrate the practicality of the circuit are included.