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Proceedings Paper

Generalized look-ahead number conversion from signed digit to complement representation with optical logic operations
Author(s): Feng Qian; Guoqiang Li
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Paper Abstract

In this paper a generalized look-ahead logic algorithm for number conversion from signed-digit to its complement representation is developed. By properly encoding the signed digits, all the operations are performed by binary logic, and unified logical expressions can be obtained for conversion from modified-signed-digit (MSD) to 2's complement, trinary signed-digit (TSD) to 3's complement, and quaternary signed-digit (QSD) to 4's complement. For optical implementation, a parallel logical array module using electron-trapping device is employed, which is suitable for realizing complex logic functions in the form of sum-of-product. The proposed algorithm and architecture are compatible with a general-purpose optoelectronic computing system.

Paper Details

Date Published: 6 December 2001
PDF: 8 pages
Proc. SPIE 4470, Photonic Devices and Algorithms for Computing III, (6 December 2001); doi: 10.1117/12.449664
Show Author Affiliations
Feng Qian, Shanghai Institute of Optics and Fine Mechanics (China)
Guoqiang Li, Shanghai Institute of Optics and Fine Mechanics (United States)


Published in SPIE Proceedings Vol. 4470:
Photonic Devices and Algorithms for Computing III
Khan M. Iftekharuddin; Abdul Ahad Sami Awwal, Editor(s)

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