Adders play a vital role in the design of a
digital system using VLSI (Very Large Scale
Integration) technique. Adders are the basic building
block of ALU (Arithmetic Logic Unit) which is an
important component of a processor. In this paper we
are comparing and analyzing the performance
parameters of basic adders like Ripple Carry Adder,
Carry Select Adder, Carry Look Ahead Adder, Parallel
Prefix Adder along with sparse adder. The above
mentioned adders are implemented using 90nm
technology in Xilinx ISE 14.7 Suite.