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Title:
Wave propagation in one- and two-dimensional arrays of bistable electronic elements
Authors:
Cigna, David Thomas
Affiliation:
OHIO UNIVERSITY
Publication:
Thesis (PhD). OHIO UNIVERSITY, Source DAI-B 60/03, p. 1140, Sep 1999, 73 pages.
Publication Date:
09/1999
Category:
Physics: Electricity and Magnetism, Engineering: Electronics and Electrical
Origin:
UMI
Abstract Copyright:
(c) 1999: UMI Company
Comment:
Publication Number: 9923663; Advisor: Hunt, Earle R.
Bibliographic Code:
1999PhDT........50C

Abstract

Propagation is explored in one- and two-dimensional arrays diode resonator circuits operated in a biased bistable state. In a 32 element one-dimensional system, the constructive role of noise on signal transmission is established. It is shown that the system's capability of reliable signal propagation is enhanced over a finite noise range. Wave propagation in a 256 element two-dimensional system is characterized in terms of wave speed as a function bias, coupling, and added noise. The ranges of parameters that allow reliable propagation are explored and the problems associated with operation outside of those ranges are addressed. Experimental evidence of noise sustained propagation of plane waves is presented. The effect of curvature on wave speed is examined with experimental results of circular wave speed as a function of radius presented. It is shown that as the circle expands the speed increases approaching that of a plane wave under the same conditions. Spiral waves are produced as further support of the curvature dependence of wave speed. Stable domains are observed and demonstrated over large ranges of coupling, bias, and noise. The stability of these domains is unexpected and unexplained.

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