Digital-Analog-Hybrid Neural Simulator: A Design-Aid For Custom-VLSI Neurochips

A. Moopenn; A. P. Thakoor; T. Duong

doi:10.1117/12.951677

17 May 1989 Digital-Analog-Hybrid Neural Simulator: A Design-Aid For Custom-VLSI Neurochips

A. Moopenn, A. P. Thakoor, T. Duong

Proceedings Volume 1058, High Speed Computing II; (1989) https://doi.org/10.1117/12.951677
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

A high speed neural network simulator and its use for the dynamics and performance analysis of feedback neural architectures are described. The simulator is based on a semi-parallel, analog-digital hybrid architecture which utilizes digital memories to store synaptic weights and analog hardware for high speed computation. A breadboard system with 8-bit gray scale synapses, designed and built at JPL, is successfully serving as a valuable design test-bed for the development of fully parallel, analog, custom VLSI neurochips, currently underway at JPL. The breadboard hybrid simulator indeed allows a detailed evaluation of hardware potential and limitations in implementing full analog operations in such chips. As an example, the paper presents an analysis of the stability and convergence behavior of a feedback neural network applied to the "Concentrator Assignment Problem" in combinatorial optimization, as studied on the analog-digital hybrid simulator. This has already resulted in a VLSI custom design of a fully parallel, analog neuroprocessor with a powerful "analog prompting" feature, for the high-speed, multiparameter optimization function.

Citation Download Citation

A. Moopenn, A. P. Thakoor, and T. Duong "Digital-Analog-Hybrid Neural Simulator: A Design-Aid For Custom-VLSI Neurochips", Proc. SPIE 1058, High Speed Computing II, (17 May 1989); https://doi.org/10.1117/12.951677

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available