Highly Efficient Analog Emulator Circuit of Memristive Behavior as a Replacement for Real Memristor

The HP memristor model serves as a theoretical benchmark for comprehending memristive behaviour; nevertheless, fabrication difficulties limit its physical realisation. This research offers an appropriate choice for circuit based research by introducing the 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), two resistors, and a capacitor. As per the simulation results, the charge-controlled memristor emulator successfully replicates key memristive properties including hysteresis, non-volatility, and dynamic resistance switching. The operational performance of the proposed circuit is verified by simulation results produced by PSpice utilising 0.18 µm CMOS technology. The results verify that, up to a frequency range of 120 KHz, the proposed emulator may function effectively with a low power supply. Additionally, the proposed memristor emulator has been validated by both simulation and experimental using the commercial ICs AD844 and LM13700. We also demonstrate the application of proposed emulator in an amoeba adaptive learning circuit.