Analog VLSI and neutral systems
Abstract
The design of neural networks and their implementation in analog VLSI systems are discussed. After reviewing background materials, computations that are not explicit functions of time are discussed, and the use of voltage and current to represent different signals at the same point in space is introduced and applied to the design of circuits that aggregate many input signals into a single useful computation. A number of circuits that compute explicit functions of time are examined. The complex plane is introduced as a representation of the temporal behavior of linear systems. The essential role of nonlinearity in the circuit examples is emphasized. Systemlevel chips built using the discussed circuits and methodology are developed, including an attempt to model certain biological structures.
 Publication:

NASA STI/Recon Technical Report A
 Pub Date:
 1989
 Bibcode:
 1989STIA...9016574M
 Keywords:

 Analog Circuits;
 Neural Nets;
 Very Large Scale Integration;
 Arithmetic And Logic Units;
 Axons;
 Cochlea;
 Differentiators;
 Electronics;
 Integrated Circuits;
 Neurons;
 Optical Measuring Instruments;
 Retina;
 Transconductance;
 Transistors;
 Electronics and Electrical Engineering