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ref: -2012 tags: phase change materials neuromorphic computing synapses STDP date: 06-13-2019 21:19 gmt revision:3 [2] [1] [0] [head]

Nanoelectronic Programmable Synapses Based on Phase Change Materials for Brain-Inspired Computing

  • Here, we report a new nanoscale electronic synapse based on technologically mature phase change materials employed in optical data storage and nonvolatile memory applications.
  • We utilize continuous resistance transitions in phase change materials to mimic the analog nature of biological synapses, enabling the implementation of a synaptic learning rule.
  • We demonstrate different forms of spike-timing-dependent plasticity using the same nanoscale synapse with picojoule level energy consumption.
  • Again uses GST germanium-antimony-tellurium alloy.
  • 50pJ to reset (depress) the synapse, 0.675pJ to potentiate.
    • Reducing the size will linearly decrease this current.
  • Synapse resistance changes from 200k to 2M approx.

See also: Experimental Demonstration and Tolerancing of a Large-Scale Neural Network (165 000 Synapses) Using Phase-Change Memory as the Synaptic Weight Element

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ref: -0 tags: Courtine PDMS soft biomaterials spinal cord e-dura date: 12-22-2017 01:29 gmt revision:0 [head]

Materials and technologies for soft implantable neuroprostheses

  • Quote: In humans, both the spinal cord and its meningeal protective membranes can experience as much as 10–20% tensile strain and
displacement (relative to the spinal canal) during normal postural movements. This motion corresponds to displacements on the order of centimetres17. The deformations relative to the spinal cord in animal models, such as rodents or non-human primates, are likely to be even larger.