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Large Developing Receptive Fields Using a Distributed and Locally Reprogrammable Address-Event Receiver

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)286-304
Number of pages19
JournalIEEE Transactions on Neural Networks
Volume21
Issue number2
DOIs
Publication statusPublished - Feb 2010

Abstract

A distributed and locally reprogrammable address-event receiver has been designed, in which incoming address-events are monitored simultaneously by all synapses, allowing for arbitrarily large axonal fan-out without reducing channel capacity. Synapses can change the address of their presynaptic neuron, allowing the distributed implementation of a biologically realistic learning rule, with both synapse formation and elimination ( synaptic rewiring). Probabilistic synapse formation leads to topographic map development, made possible by a cross-chip current-mode calculation of Euclidean distance. As well as synaptic plasticity in rewiring, synapses change weights using a competitive Hebbian learning rule (spike-timing-dependent plasticity). The weight plasticity allows receptive fields to be modified based on spatio-temporal correlations in the inputs, and the rewiring plasticity allows these modifications to become embedded in the network topology.

    Research areas

  • Address–event representation (AER) , Euclidean distance , neural network architecture , neural network hardware , neuromorphic very large scale integration (VLSI) , synapse elimination , synapse formation , synaptic rewiring, topographic map

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