Efficient optical lookahead-mode conversion from modified signed-digit to 2's complement representation

摘要

The modified-signed-digit (MSD) number system offers parallel arithmetic operations because carry propagation is confined only within two adjacent digit positions. In this paper, an efficient lookahead-mode conversion algorithm from the MSD representation to the 2's complement binary representation is introduced. The operation can be performed in parallel by binary logic and is thus suitable for optical implementation. The optical system utilizing 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. [References: 35]