A Passive and Scalable High-Order Neuromorphic Circuit Enabled by Mott Memristors

In this study, VO<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Mott memristors have been successfully fabricated, leading to the proposal of a passive and scalable high-order neural circuit. This circuit consists of two coupled VO<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Mott memristors, two resistors, and three capacitors. The proposed high-order neural circuit demonstrates 11 distinct firing behaviors similar to those of biological neurons, along with controllable burst firing patterns. The spikes, inter-spike interval (ISI) within a burst, and the quiescence interval between bursts can be adjusted by varying the capacitance and resistance values. Additionally, this circuit operates without the need for a bias supply or inductors, enhancing its scalability. This design not only improves circuit interconnection but also effectively reduces power consumption, providing a solid foundation for the development of spiking neural networks (SNNs).