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Implementation of the modified-signed digit(MSD) number adder using triple rail-coding input and symbolic substitution  

Shin, Chang-Mok (Optical Signal Processing Lab, School of Electrical Engineering and Computer Science, Kyungpook Nat'l University)
Kim, Soo-Joong (Optical Signal Processing Lab, School of Electrical Engineering and Computer Science, Kyungpook Nat'l University)
Seo, Dong-Hoan (Division of Electrical and Electronics Engineering, Korea Maritime University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.41, no.6, 2004 , pp. 43-51 More about this Journal
Abstract
An optical parallel modified signed-digit(MSD) number adder system is proposed by using triple rail-coding input patterns and serial arrangement method of symbolic substitution. By combing overlapped arithmetic results. which are produced by encoding MSD input as triple rail-coding patterns. into the same patterns, symbolic substitution rules are reduced and also by using serialized and space-shifted input patterns in optical experiments, the optical adder without space-shifting operation, NOR operation and threshold operation is implemented.
Keywords
symbolic substitution; optical adder; serial arrangement; modified signed-digit number;
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