NDLI: Programmable neural logic

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Programmable neural logic

Content Provider	IEEE Xplore Digital Library
Author	Bohossian, V. Hasler, P. Bruck, J.
Copyright Year	1994
Abstract	Circuits of threshold elements (Boolean input, Boolean output neurons) have been shown to be surprisingly powerful. Useful functions such as XOR, ADD and MULTIPLY can be implemented by such circuits more efficiently than by traditional AND/OR circuits. In view of that, we have designed and built a programmable threshold element. The weights are stored on polysilicon floating gates, providing long-term retention without refresh. The weight value is increased using tunneling and decreased via hot electron injection. A weight is stored on a single transistor allowing the development of dense arrays of threshold elements. A 16-input programmable neuron was fabricated in the standard 2 /spl mu/m double-poly, analog process available from MOSIS. We also designed and fabricated the multiple threshold element. It presents the advantage of reducing the area of the layout from O(n/sup 2/) to O(n), (n being the number of variables) for a broad class of Boolean functions, in particular symmetric Boolean functions such as PARITY. A long term goal of this research is to incorporate programmable single/multiple threshold elements, as building blocks in field programmable gate arrays.
Sponsorship	IEEE Computer Society
Starting Page	346
Ending Page	351
Page Count	6
File Size	267100
File Format	PDF
ISSN	10709894
Volume Number	21
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-11-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Boolean functions Neurons Logic circuits Polynomials Silicon Tunneling Secondary generated hot electron injection Neuromorphics Computer science Field programmable analog arrays
Content Type	Text
Resource Type	Article
Subject	Engineering

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