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

In this study, VO₂ 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 VO₂ 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, interspike interval (ISI) within a burst, and the quiescence interval between bursts can be adjusted by varying the capacitance and resistance values. In addition, 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).