An inductorless CMOS realization of Chua’s circuit

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 μm Mietec process are presented.