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Time-varying data processing with nonvolatile memristor-based temporal kernel

Author

Listed:
  • Yoon Ho Jang

    (Seoul National University
    Seoul National University)

  • Woohyun Kim

    (Seoul National University
    Seoul National University)

  • Jihun Kim

    (Seoul National University
    Seoul National University)

  • Kyung Seok Woo

    (Seoul National University
    Seoul National University)

  • Hyun Jae Lee

    (Seoul National University
    Seoul National University)

  • Jeong Woo Jeon

    (Seoul National University
    Seoul National University)

  • Sung Keun Shim

    (Seoul National University
    Seoul National University)

  • Janguk Han

    (Seoul National University
    Seoul National University)

  • Cheol Seong Hwang

    (Seoul National University
    Seoul National University)

Abstract

Recent advances in physical reservoir computing, which is a type of temporal kernel, have made it possible to perform complicated timing-related tasks using a linear classifier. However, the fixed reservoir dynamics in previous studies have limited application fields. In this study, temporal kernel computing was implemented with a physical kernel that consisted of a W/HfO2/TiN memristor, a capacitor, and a resistor, in which the kernel dynamics could be arbitrarily controlled by changing the circuit parameters. After the capability of the temporal kernel to identify the static MNIST data was proven, the system was adopted to recognize the sequential data, ultrasound (malignancy of lesions) and electrocardiogram (arrhythmia), that had a significantly different time constant (10−7 vs. 1 s). The suggested system feasibly performed the tasks by simply varying the capacitance and resistance. These functionalities demonstrate the high adaptability of the present temporal kernel compared to the previous ones.

Suggested Citation

  • Yoon Ho Jang & Woohyun Kim & Jihun Kim & Kyung Seok Woo & Hyun Jae Lee & Jeong Woo Jeon & Sung Keun Shim & Janguk Han & Cheol Seong Hwang, 2021. "Time-varying data processing with nonvolatile memristor-based temporal kernel," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25925-5
    DOI: 10.1038/s41467-021-25925-5
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