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Multi-neuron connection using multi-terminal floating–gate memristor for unsupervised learning

Author

Listed:
  • Ui Yeon Won

    (Sungkyunkwan University
    Electronic Devices research Team)

  • Quoc An Vu

    (Sungkyunkwan University)

  • Sung Bum Park

    (Sungkyunkwan University)

  • Mi Hyang Park

    (Sungkyunkwan University)

  • Van Dam Do

    (Sungkyunkwan University)

  • Hyun Jun Park

    (Mobile Communication Business, Samsung Electronics)

  • Heejun Yang

    (Korea Advanced Institute of Science and Technology)

  • Young Hee Lee

    (Sungkyunkwan University
    Sungkyunkwan University)

  • Woo Jong Yu

    (Sungkyunkwan University)

Abstract

Multi-terminal memristor and memtransistor (MT-MEMs) has successfully performed complex functions of heterosynaptic plasticity in synapse. However, theses MT-MEMs lack the ability to emulate membrane potential of neuron in multiple neuronal connections. Here, we demonstrate multi-neuron connection using a multi-terminal floating-gate memristor (MT-FGMEM). The variable Fermi level (EF) in graphene allows charging and discharging of MT-FGMEM using horizontally distant multiple electrodes. Our MT-FGMEM demonstrates high on/off ratio over 105 at 1000 s retention about ~10,000 times higher than other MT-MEMs. The linear behavior between current (ID) and floating gate potential (VFG) in triode region of MT-FGMEM allows for accurate spike integration at the neuron membrane. The MT-FGMEM fully mimics the temporal and spatial summation of multi-neuron connections based on leaky-integrate-and-fire (LIF) functionality. Our artificial neuron (150 pJ) significantly reduces the energy consumption by 100,000 times compared to conventional neurons based on silicon integrated circuits (11.7 μJ). By integrating neurons and synapses using MT-FGMEMs, a spiking neurosynaptic training and classification of directional lines functioned in visual area one (V1) is successfully emulated based on neuron’s LIF and synapse’s spike-timing-dependent plasticity (STDP) functions. Simulation of unsupervised learning based on our artificial neuron and synapse achieves a learning accuracy of 83.08% on the unlabeled MNIST handwritten dataset.

Suggested Citation

  • Ui Yeon Won & Quoc An Vu & Sung Bum Park & Mi Hyang Park & Van Dam Do & Hyun Jun Park & Heejun Yang & Young Hee Lee & Woo Jong Yu, 2023. "Multi-neuron connection using multi-terminal floating–gate memristor for unsupervised learning," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38667-3
    DOI: 10.1038/s41467-023-38667-3
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    References listed on IDEAS

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