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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 26 — Sep. 10, 1999
  • pp: 5621–5630

Two-step digit-set-restricted modified signed-digit addition–subtraction algorithm and its optoelectronic implementation

Feng Qian, Guoqiang Li, Hao Ruan, Hongmei Jing, and Liren Liu  »View Author Affiliations


Applied Optics, Vol. 38, Issue 26, pp. 5621-5630 (1999)
http://dx.doi.org/10.1364/AO.38.005621


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Abstract

A novel, to our knowledge, two-step digit-set-restricted modified signed-digit (MSD) addition–subtraction algorithm is proposed. With the introduction of the reference digits, the operand words are mapped into an intermediate carry word with all digits restricted to the set {1̅, 0} and an intermediate sum word with all digits restricted to the set {0, 1}, which can be summed to form the final result without carry generation. The operation can be performed in parallel by use of binary logic. An optical system that utilizes an electron-trapping device is suggested for accomplishing the required binary logic operations. By programming of the illumination of data arrays, any complex logic operations of multiple variables can be realized without additional temporal latency of the intermediate results. This technique has a high space–bandwidth product and signal-to-noise ratio. The main structure can be stacked to construct a compact optoelectronic MSD adder–subtracter.

© 1999 Optical Society of America

OCIS Codes
(200.0200) Optics in computing : Optics in computing
(200.3760) Optics in computing : Logic-based optical processing
(200.4560) Optics in computing : Optical data processing
(200.4660) Optics in computing : Optical logic
(200.4960) Optics in computing : Parallel processing

History
Original Manuscript: February 25, 1999
Revised Manuscript: June 14, 1999
Published: September 10, 1999

Citation
Feng Qian, Guoqiang Li, Hao Ruan, Hongmei Jing, and Liren Liu, "Two-step digit-set-restricted modified signed-digit addition–subtraction algorithm and its optoelectronic implementation," Appl. Opt. 38, 5621-5630 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-26-5621


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