Efficient adder circuits based on a conservative reversible logic gate

J. Bruce, M. Thornton, L. Shivakumaraiah, P. S. Kokate, X. Li
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引用次数: 201

Abstract

Conservative and reversible logic gates are widely known to be compatible with revolutionary computing paradigms such as optical and quantum computing. A fundamental conservative reversible logic gate is the Fredkin gate. This paper presents efficient adder circuits based on the Fredkin gate. Novel full adder circuits using Fredkin gates air proposed which have lower hardware complexity than the current state-of-the-art, while generating the additional signals required for carry skip adder architectures. The traditional ripple carry adder and several carry skip adder topologies are compared. Theoretical performance of each adder is determined and compared. Although the variable sized block carry skip adder is determined to have shorter delay than the fixed block size carry skip adder, the performance gains are not sufficient to warrant the required additional hardware complexity.
基于保守可逆逻辑门的高效加法器电路
众所周知,保守和可逆逻辑门与光学和量子计算等革命性计算范式兼容。一个基本的保守可逆逻辑门是弗雷德金门。本文提出了一种基于弗雷德金门的高效加法器电路。采用弗雷德金门空气的新型全加法器电路,其硬件复杂度比当前最先进的电路低,同时产生进位跳加法器架构所需的额外信号。比较了传统的纹波进位加法器和几种进位跳加法器拓扑结构。确定并比较了各加法器的理论性能。虽然可变大小的块进位跳加器比固定大小的块进位跳加器具有更短的延迟,但性能增益不足以保证所需的额外硬件复杂性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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