Modified signed-digit addition by using binary logic operations and its optoelectronic implementation

Citation
F. Qian et al., Modified signed-digit addition by using binary logic operations and its optoelectronic implementation, OPT LASER T, 31(6), 1999, pp. 403-410
Citations number
23
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICS AND LASER TECHNOLOGY
ISSN journal
00303992 → ACNP
Volume
31
Issue
6
Year of publication
1999
Pages
403 - 410
Database
ISI
SICI code
0030-3992(199909)31:6<403:MSABUB>2.0.ZU;2-M
Abstract
In this work, a three-step modified signed-digit (MSD) addition by using bi nary logic operations is proposed. Each input digit is encoded with two bin ary bits. Through binary logic operations, all of the weight and transfer d igits and the final sum digits represented with the same encoding scheme wi ll be generated. The operations can be performed at each digit position in parallel. In our suggested optical arithmetic and logic unit (ALU), a singl e electron trapping (ET) device is employed to serve its the binary logic d evice. This technique based on ET logic possesses the advantage of high sig nal-to-noise ratio (SNR). The optoelectronic system can be constructed in a simple. compact and general-purpose form. (C) 2000 Elsevier Science Ltd. A ll rights reserved.