COMPARITIVE ANALYSIS OF BRENT–KANG & KOGGE–STONE PARALLEL–PREFIX ADDER FOR THEIR AREA, DELAY & POWER CONSUMPTION

M.Prasannakumar; V.Sidharthan; Dr. K. Gopalakrishnan

Volume : V, Issue : X, October - 2015

COMPARITIVE ANALYSIS OF BRENT–KANG & KOGGE–STONE PARALLEL–PREFIX ADDER FOR THEIR AREA, DELAY & POWER CONSUMPTION

M. Prasannakumar, V. Sidharthan, Dr. K. Gopalakrishnan

Abstract :

Parallel Prefix adders have been one of the most notable among several designs proposed in the past. Parallel Prefix adders (PPA) are family of adders derived from the commonly known carry look ahead adders. The need for a Parallel Prefix adder is that it is primarily fast when compared with ripple carry adders. The classical parallel prefix adder structures presented in the literature over the years optimize for logic depth, area, and fan–out and interconnect count of logic circuits. In this paper, a comparison of two 8– bit parallel–Prefix adder (BENT–KANG AND KOGGE–STONE) in their area, delay, power is proposed. In this proposed system Bent–kang and Kogge–stone parallel prefix adder are used for comparison. The results reveal that the proposed Bent–kang Parallel–Prefix adder is more competent than Kogge–stone Parallel–Prefix adder in terms of area, delay & power. Simulation results are compared and verified using Xilinx 8.1i software