Departmental Papers (BE)

Document Type

Conference Paper

Date of this Version

May 2006

Comments

Copyright 2006 IEEE. Reprinted from Proceedings of the IEEE International Symposium on Circuits and Systems (ISCAS 2006), May 2006, 4 pages.

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Abstract

We describe a neuromorphic chip with a two-layer excitatory-inhibitory recurrent network of that exhibits localized clusters of neural activity. Unlike other recurrent networks, the clusters in our network are pinned to certain locations due to transistor mismatch introduced in fabrication. As described in previous work, our pinned clusters respond selectively to oriented stimuli and the neurons' preferred orientations are distributed similar to the visual cortex. Here we show that orientation computation is rapid when activity alternates between layers (staccato-like), dislodging pinned clusters, which promotes fast cluster diffusion.

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Date Posted: 29 August 2007

This document has been peer reviewed.