Analysis and comparison of ripple carry full adders by speed

This paper presents a new method for analysis and comparison of ripple carry full adders by speed on the basis of a new criterion “Equal Delay Capacity”. It has been shown that abstract values of compared one-bit adders delays, on which existing comparison methods are based, does not give the clear answer to a question about their behavior in N-bit devices. At the same time, comparison of the finished N-bit adders through a complete simulation cycle takes a lot of time, even if the most advanced software products are used. The proposed method allows quickly and exactly comparing various one-bit adders cell designs by speed for the specific application in devices.