Optical lookahead-mode conversion from modified signed-digit to 2's complement representation
Conference
Qian, F, Li, G, Ruan, H et al. (1999). Optical lookahead-mode conversion from modified signed-digit to 2's complement representation
. Proceedings of SPIE - The International Society for Optical Engineering, 3805 287-294.
Qian, F, Li, G, Ruan, H et al. (1999). Optical lookahead-mode conversion from modified signed-digit to 2's complement representation
. Proceedings of SPIE - The International Society for Optical Engineering, 3805 287-294.
The modified signed-digit (MSD) number system offers parallel arithmetic operations because of its redundancy property. For exploiting the high parallelism of the MSD representation, MSD form and 2's complement binary form have to be converted to and from each other. In this paper, an efficient lookahead-mode conversion algorithm is introduced. The operation can be performed in parallel by binary logic and is thus suitable for optical implementation. The optical system utilizing a single electronic trapping (ET) device is suggested to realize the required operations. By programming the illumination of data arrays, any complex logic operations of multiple variables can be performed easily. The main hardware can be stacked to construct a compact optoelectronic processor of versatile functions. A proof-of-the-principle experiment is demonstrated.
