Active implementation of Chua’s diode employing MOSFET

Abstract

This research work contributes a Chua’s circuit design using only two Metal-Oxide- Semiconductor-Field-Effect-Transistor (MOSFET) based Chua’s diode. This design enables the following advantages like: $\left(i\right)$ Use of a minimum number of transistors, $\left(ii\right)$ Absence of passive components in Chua’s diode, $\left(iii\right)$ High packaging density with 108.9 $\mu$m${}^2$ chip area, $\left(iv\right)$ Suitable for the generation of all fundamental bifurcation sequences. The workability of the circuit is verified using Cadence’s Virtuoso tool with gpdk 180 nm technology parameters, along with the process, biasing (bias current), and temperature variation analysis. Moreover, an experimental validation is performed using commercially available N-MOSFET (2N7000). The proposed design is suitable for Chaotic-Amplitude-Shift-Keying (CASK) transmission for secure communication. At end, a comparative analysis is done with the available Chua’s circuit.