Organic neuromorphic devices mimic signal processing features of biological synapses, with short-term plasticity, STP, modulated by the frequency of the input voltage pulses. Here, an artificial synapse, made of intracortical microelectrodes, is demonstrated that exhibits either depressive or facilitative STP. The crossover between the two STP regimes is controlled by the frequency of the input voltage. STP features are described with an equivalent circuit where an inductance component is introduced in parallel with the RC circuit associated with poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT/PSS)||electrolyte interface. The proposed RLC circuit explains the physical origin of the observed STP and its two timescales in terms of charge build up in PEDOT/PSS.

中文翻译：

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可植入的有机人工突触表现出抑郁和促进可塑性反应之间的交叉

有机神经形态器件模仿生物突触的信号处理特征，具有短期可塑性，STP，由输入电压脉冲的频率调制。在这里，由皮层内微电极制成的人工突触被证明具有抑制性或促进性 STP。两个 STP 机制之间的交叉由输入电压的频率控制。STP 特性用等效电路描述，其中电感分量与与聚（3,4-亚乙基二氧噻吩）/聚苯乙烯磺酸盐 (PEDOT/PSS)|| 电解质界面相关的 RC 电路并联引入。建议的 RLC 电路解释了观察到的 STP 的物理起源及其在 PEDOT/PSS 中电荷积累的两个时间尺度。