Four-operand parallel optical computing using shadow-casting technique |
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Authors: | R S Fyath S A Ali M S Alam |
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Institution: | a Department of Electrical Engineering, College of Engineering, University of Basrah, Iraq;b Department of Electrical and Computer Engineering, University of South Alabama, 307 North University Blvd., EEB 78, Mobile, AL 36688 0002, USA |
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Abstract: | Optical shadow-casting (OSC) technique has shown excellent potential for optically implementing two-operand parallel logic gates and array logic operations. The 16 logic functions for two binary patterns (variables) are optically realizable in parallel by properly configuring an array of 2×2 light emitting diodes. In this paper, we propose an enhanced OSC technique for implementing four-operand parallel logic gates. The proposed system is capable of performing 216 logic functions by simply programming the switching mode of an array of 4×4 light emitting diodes in the input plane. This leads to an efficient and compact realization scheme when compared to the conventional two-operand OSC system. |
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Keywords: | Parallel optical computing Shadow-casting Four-operand Overlapping pattern |
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