Highly efficient analog emulator circuit of memristive behavior as substitute for real memristor

Abstract

The HP memristor model serves as a theoretical benchmark for comprehending memristive behaviour; nevertheless, fabrication difficulties limit its physical realisation. This research introduces a circuit-based design of an equivalent HP memristor model. In order to replicate the non-linear characteristics of the HP memristor using a charge-dependent resistance modulation technique, the proposed emulator is designed using off-the-shelf components such as an operational transconductance amplifier (OTA), a modified second-generation current conveyor (M-CCII), an operational amplifier (Op-amp), resistors, and a capacitor. The primary objective is to develop a low-cost, user-friendly emulator suitable for real-time applications. As per the simulation results, the charge-controlled memristor emulator successfully replicates key memristive properties including hysteresis, non-volatility, and dynamic resistance switching. The emulator’s performance is verified through PSpice simulations using 0.18 μm CMOS technology, demonstrating effective operation up to 120 kHz under low power conditions. Additionally, the proposed emulator has been validated by both simulation and experimental using the commercial ICs AD844 and LM13700. Finally, the functional applicability of the proposed emulator is demonstrated through its integration in an amoeba adaptive learning circuit.