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
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.