Fundamental Device and Circuits for Synaptic Connections in Self-Organizing Neural Networks

Kohji HOSONO  Kiyotaka TSUJI  Kazuhiro SHIBAO  Eiji IO  Hiroo YONEZU  Naoki OHSHIMA  Kangsa PAK  

IEICE TRANSACTIONS on Electronics   Vol.E79-C   No.4   pp.560-567
Publication Date: 1996/04/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electronic Circuits
neuro-device,  condensation of functions,  synaptic connection,  self-organization,  winner-take-all,  lateral inhibition,  

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Using fundamental device and circuits, we have realized three functions required for synaptic connections in self-organizing neural networks: long term memory of synaptic weights, fixed total amount of synaptic weights in a neuron, and lateral inhibition. The first two functions have been condensed into an optical adaptive device and circuits with floating gates. Lateral inhibition has been realized by a winner-take-all circuit and a following lateral excitatory connection circuit. We have fabricated these devices and circuits using CMOS technology and confirmed the three functions. In addition, topological mapping, which is essential for feature extraction, has been formed in a primitive network constructed with the fundamental device and circuits.