A synaptic transistor is an electrical device that can learn in ways similar to a neural synapse (the site of transmission of electric nerve impulses between two nerve cells). It optimizes its own properties for the functions it has carried out in the past.
The device mimics the behavior of the property of neurons called spike-timing-dependent plasticity, or STDP. The process adjusts the connection strengths based on the relative timing of a particular neuron’s output and input action potentials (or spikes).
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The Daily Omnivore 