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1 March 1991 OLAS: optical logic array structures
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Logic Array Structures (LAS) represent a class of sub-systems used in VLSI design. The principal reasons for the deployment of this class in design are their regularity of structure, ease of automation and verification. In addition, the mapping of 2-level Boolean functions is relatively easy to implement. Such an array structure consists of an AND-array/OR-array combination which represents the sum of products of the required Boolean function. The principal inherent disadvantages are the limitations of switching speed and fabrication area. Such advantages would be obviated by the use of optical couplers (Fig. 1) and waveguides, in which speeds would be increased by at least three orders of magnitude. Also the trends in the fabrication of optical waveguides indicate that a substantial saving in area is possible. 2The orthogonal nature of both LAS and OLAS implies that these waveguides would exhibit low loss factors.3 , This paper presents the theory of OLAS together with possible implementations. Discussion of future implications are included.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robert Howard Jones, Marios G. Hadjinicolaou, and G. Musgrave "OLAS: optical logic array structures", Proc. SPIE 1401, Optical Data Storage Technologies, (1 March 1991);


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