Benchmarking stochasticity behind reproducibility: denoising strategies in Ta$_2$O$_5$ memristors
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910756994285568 |
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| author | Nyáry, Anna Balogh, Zoltán Sánta, Botond Lázár, György Olalla, Nadia Jimenez Leuthold, Juerg Csontos, Miklós Halbritter, András |
| author_facet | Nyáry, Anna Balogh, Zoltán Sánta, Botond Lázár, György Olalla, Nadia Jimenez Leuthold, Juerg Csontos, Miklós Halbritter, András |
| contents | Reproducibility, endurance, driftless data retention, and fine resolution of the programmable conductance weights are key technological requirements against memristive artificial synapses in neural network applications. However, the inherent fluctuations in the active volume impose severe constraints on the weight resolution. In order to understand and push these limits, a comprehensive noise benchmarking and noise reduction protocol is introduced. Our approach goes beyond the measurement of steady-state readout noise levels and tracks the voltage-dependent noise characteristics all along the resistive switching $I(V)$ curves. Furthermore, we investigate the tunability of the noise level by dedicated voltage cycling schemes in our filamentary Ta$_2$O$_5$ memristors. This analysis highlights a broad, order-of-magnitude variability of the possible noise levels behind seemingly reproducible switching cycles. Our nonlinear noise spectroscopy measurements identify a subthreshold voltage region with voltage-boosted fluctuations. This voltage range enables the reconfiguration of the fluctuators without resistive switching, yielding a highly denoised state within a few subthreshold cycles. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_16080 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Benchmarking stochasticity behind reproducibility: denoising strategies in Ta$_2$O$_5$ memristors Nyáry, Anna Balogh, Zoltán Sánta, Botond Lázár, György Olalla, Nadia Jimenez Leuthold, Juerg Csontos, Miklós Halbritter, András Mesoscale and Nanoscale Physics Materials Science Reproducibility, endurance, driftless data retention, and fine resolution of the programmable conductance weights are key technological requirements against memristive artificial synapses in neural network applications. However, the inherent fluctuations in the active volume impose severe constraints on the weight resolution. In order to understand and push these limits, a comprehensive noise benchmarking and noise reduction protocol is introduced. Our approach goes beyond the measurement of steady-state readout noise levels and tracks the voltage-dependent noise characteristics all along the resistive switching $I(V)$ curves. Furthermore, we investigate the tunability of the noise level by dedicated voltage cycling schemes in our filamentary Ta$_2$O$_5$ memristors. This analysis highlights a broad, order-of-magnitude variability of the possible noise levels behind seemingly reproducible switching cycles. Our nonlinear noise spectroscopy measurements identify a subthreshold voltage region with voltage-boosted fluctuations. This voltage range enables the reconfiguration of the fluctuators without resistive switching, yielding a highly denoised state within a few subthreshold cycles. |
| title | Benchmarking stochasticity behind reproducibility: denoising strategies in Ta$_2$O$_5$ memristors |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2412.16080 |