A SPICE Model of Electrolyte Synaptic Transistors

In recent years, electrolyte synaptic transistors have become a popular choice for neuromorphic computing hardware due to their low power consumption, high linearity, and dynamic conductance modulation capabilities. However, the lack of precise circuit models of electrolyte synaptic transistors limits the convenience of exploring electrolyte transistors-based circuits or systems. In this study, we propose a universal model for electrolyte synaptic transistors by decoupling ionic and electronic transport process. The model is highly flexible and adaptable to various electrolyte synaptic transistor devices, allowing for easy modulation of synaptic characteristics through parameter adjustments. Inspired by the adaptive capabilities of biological sensory systems, we constructed a simplified circuit based on the proposed model and validated it through LTSPICE simulations. The results demonstrate that the model accurately captures the pulse modulation capabilities of electrolyte synaptic transistors and effectively simulates the response characteristics of biological sensory neurons. The proposed electrolyte synaptic transistor model would facilitate the convenience of exploring electrolyte transistors-based circuits or systems.