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Experimental Robust Spontaneous Synchronizations in Coupled NbOx Oscillation Neurons for Unconventional Computing
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- Authors
- Hyun Wook Kim, Seung-Youl Kang, Jaehyun Moon, Nayeon Kim, Eunryeong Hong, Seyeong Jeon, Seonuk Jeon, Jiyong Woo
- Issue Date
- 2023-12
- Citation
- IEEE Transactions on Electron Devices, v.70, no.12, pp.6699-6702
- ISSN
- 0018-9383
- Publisher
- Institute of Electrical and Electronics Engineers
- Language
- English
- Type
- Journal Article
- Abstract
- In this brief, we demonstrate experimentally achieved oscillation dynamics in coupled NbOx threshold switch (TS)-based oscillation neurons (ONs). We first show the challenges in observing oscillation caused by device variability, which is further validated through HSPICE simulations. To obtain robust oscillation response, a reliable TS developed via atomic layer deposition for conformal NbOx is introduced. By developing coupled NbOx ONs using a coupling resistor ( RC ), the out-of-phase synchronization is demonstrated owing to the weak connection. Moreover, we achieve a transition to in-phase synchronization as the coupling strength increases, showing an inverse relationship with the magnitude of RC . Based on these results, oscillatory neural networks, where multiple NbOx ONs are fully connected, are examined to execute pattern recognition via MATALB simulations.