Memristor emulator circuit development, simulation and application for analogue applications

Memristors, renowned for their unique capacity to retain charge flow data, are acknowledged as pivotal components for advancing memory storage and computing technologies. However, their widespread adoption is hindered by complex fabrication processes and high costs. Consequently, researchers are exploring alternative approaches, such as emulator circuits, to replicate the characteristics of memristors. Numerous researchers have delved into the development of a wide array of emulator circuits, incorporating various configurations involving integrated circuit components, transistor-based designs, and hybrid setups that merge both integrated circuit elements and transistors. The hysteresis loop, a fundamental characteristic of memristors, describes the relationship between applied voltage and resulting current, showcasing the device's memory-like behavior. In memristors, the area of the hysteresis loop, known as the Pinch Hysteresis Loop (PHL), decreases as the frequency of applied signals increases. This study proposes a high-frequency memristor emulator that utilizes analog blocks to accurately replicate memristive behavior. Operational amplifier-based circuits are chosen for this research. Unlike traditional emulator circuits, the proposed design incorporates Schottky diodes and high-speed integrated circuits (ICs), enabling it to operate across a wide frequency range. This presents a simpler and more cost-effective alternative to existing complex emulators. The theoretical formulations of the emulator are rigorously validated through PROTEUS simulations covering various frequencies, demonstrating operational functionality ranging from 100 Hz to 1 MHz. This confirms the effectiveness of the proposed emulator in accurately simulating memristive behavior across a broad frequency spectrum. Additionally, the proposed circuits are implemented experimentally, providing further validation of their effectiveness in replicating memristive behavior across a wide frequency range.