Posts in category: El-Sedeek A.L.

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.

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.

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.