Hu, Suman Kang, Jaehyun Kim, Taeyoon Lee, Suyoun Park, Jong Keuk Kim, Inho Kim, Jaewook Kwak, Joon Young Park, Jongkil Kim, Gyu-Tae Choi, Shinhyun Jeong, Yeonjoo 2024-01-12T03:32:54Z 2024-01-12T03:32:54Z 2022-02-21 2022-01 2169-3536 https://pubs.kist.re.kr/handle/201004/76813 Neuromorphic hardware is a system with massive potential to enable efficient computing by mimicking the human brain. The novel system processes information using neuron spikes (Action Potentials) and the synaptic connections between neurons are trained using biologically plausible methods like spike-timing-dependent plasticity (STDP). Memristor is one of the promising candidates to implement such neuromorphic hardware. Two types of memristors, diffusive and drift, have been proposed to form a synapse showing faithful emulation of STDP, where the diffusion effect is used to trace the spike timing history crucial for STDP and the drift memristor keeps the weight information in a longer time scale. The purpose of this paper is to systematically investigate STDP characteristics in such a synapse with serially connected two memristors using SPICE models. The results show that STDP properties are strongly dependent on device parameters and even the shape of STDP curves is modified. Different shapes of the STDP curve were identified. The results and analysis could support the design of emerging device-based synapses, which can faithfully mimic biological STDP characteristics for future neuromorphic systems. English Institute of Electrical and Electronics Engineers Inc. SPICE Study of STDP Characteristics in a Drift and Diffusive Memristor-Based Synapse for Neuromorphic Computing Article 10.1109/ACCESS.2022.3140476 1 IEEE Access, v.10, pp.6381 - 6392 IEEE Access 10 6381 6392 Y scie scopus 000744489900001 2-s2.0-85122576480 Computer Science, Information Systems Engineering, Electrical & Electronic Telecommunications Computer Science Engineering Telecommunications MODEL NETWORKS DEVICES MEMORY Immune system Neurons SPICE Shape Biological system modeling Ca-2+ drift memristor diffusive memristor hump STDP SPICE simulation voltage division Memristors Synapses