Design Of Area And Speed Efficient Square Root Carry Select Adder Using Fast Adders

Abstract Area and speed are the most important design objectives in integrated circuits. As addition is the basic operation of all computer arithmetic adders are one of the widely used components in digital integrated circuit design. Since propagation of carry is of major concern in designing efficient adders this paper presents different fast adders and their performance analysis. Among all the adders discussed Square root Carry Select Adder SQCSA provides a good compromise between cost and performance. As Conventional SQCSA is still area consuming due to dual Ripple Carry AdderRCAstructures modifications are done at gate level to reduce area. Modified SQCSA is designed using fast adders like Carry Skip Adder CSA and Carry Look-Ahead Adder CLA to increase the speed of operation.