Modeling triplet spike timing dependent plasticity using a hybrid TFT-memristor neuromorphic synapse |
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| Affiliation: | 1. College of Computer, National University of Defense Technology, Changsha, 410073, China;2. State Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha, 410073, China;3. Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA;4. Department of Computer Science, University of Pittsburgh, Pittsburgh, PA 15260, USA;1. Institute of Microelectronics, Department of Electrical Engineering, National Cheng-Kung University, Tainan, Taiwan;2. Department of Electronic Engineering, I-Shou University, Kaohsiung, Taiwan;1. State Key Laboratory of Computer Architecture, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, 100190, PR China;2. University of Chinese Academy of Sciences, Beijing, 100049, PR China;3. Duke University, Durham, NC, 27708, USA;4. School of Microelectronics, Xi''an Jiaotong University, Xi''an, Shanxi, 710049, PR China;2. CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal |
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| Abstract: | Triplet-based Spike Timing Dependent Plasticity (TSTDP) is an enhanced synaptic plasticity rule which can be implemented using new nano-scale technologies. Nanocrystalline-silicon thin film transistors (TFT) and memristors are of these nano-scale devices which can be integrated into three-dimensions using low-temperature processing. This paper proposes a new hybrid TFT-memristive circuit that implements the TSTDP. The proposed circuit is composed of two nanoparticle memory-TFTs in series with a current/charge controlled memristor, as the synapse. Our simulation results, using spike pairs with various timing intervals and frequencies, as well as different spike triplets, demonstrate a particularly close match to realistic biological measurements. |
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| Keywords: | Memristor Nanocrystalline-silicon thin film transistor (TFT) Synapse Spike-timing-dependent plasticity (STDP) |
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