Comparative Analysis of Modified CSLA Dominated by Carry Generation Logic with SQRT CSLA Adder
Author Name : Y Kavya Kiran, K Bala Sindhuri, N Udaya Kumar
ABSTRACT ACarry Select Adder (CSLA) is one of the simplest and fastest adder that performs high speed operations by using Ripple Carry Adders(RCA) and multiplexers which can be best suited for arithmetic circuits, MAC units and other digital systems. To further improve the performance in terms of area and power consumption, Modified CSLA dominated by carry generation logic is designed by using logic optimization technique. The main objective of this modified CSLAdominated by carry generation logic is to reduce Carry Propagation Delay (CPD) by employing bit slice logic along with the optimized width functional blocks.In this paper, comparative analysis for different adders such as modified CSLA dominated by carry generation logic andSQRT CLSA is done. Simulation and synthesis results are carried out usingXilinx Vivado v2017.2 software tool. The outcomes show that the modified CSLA dominated by carry generation logic by using 32-bit reduces the combination delay (ns) by 17.40%, power consumption (W) by 19.33% and LUT’s by 60.52% compared to SQRT CSLA.