三值光学计算机一种限制输入一步式msd加法器

Abstract

On the basis of the research in MSD adder of Ternary Optical Computer (TOC), further work is carried out in one-step MSD adder with restricted input symbols. In this paper, the principle of general one-step MSD adder is introduced briefly. The core part of the principle can be reduced to the new conceptions of mid-bit transform, mid-bit transform table (MTT) and mid-bit transform unit (MTU). By restricting the input symbols, a simplified mid-bit transform table is obtained. Through the deep analysis to the simplified MTT, the subtransforms V and U as well as the main transform of the mid-bit transform are obtained, and the corresponding optical graphs are designed. Based on these, the structure of one-step MSD adder with restricted input symbols is proposed and its structure is designed. The software simulation and experiment to the mid-bit transform and the one-step adder show that the designed one-step MSD adder is effective. The adder will be one of the basic components of the ternary optical computer.