• Jyotsna Rani Nelli

Adders are the important and essential block of the digital circuit. It performs the addition in a digital circuit and so the overall performance of the digital circuit depends on the selection of a suitable adder. The proper selection of adder is needed to reduce the extra laborious work and complexity of a digital system. In this paper, we are comparing the different adders that have been synthesized using the Xilinx synthesis tool and simulated using the Verilog hardware description language and Xilinx simulation tool. The output of the simulation data helps in observing the different properties of adder. These properties get on the difference in operation and execution of the adders. Prefix Adder (PA), Kogge Stone Adder (KSA), Carry Select Adder (CSLA), Carry Skip Adder (CSKA), Carry Look Ahead Adder (CLA) and Ripple Carry Adder (RCA) have been compared with help of three basic aspects namely, device utilization i.e., number of slices, delay and power.

Parallel prefix adder

"Design and Analysis of Basic Adder with 8-bit Parallel Prefix Adder", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 8, page no.b541-b551, August-2022, Available :http://www.jetir.org/papers/JETIR2208165.pdf

"Design and Analysis of Basic Adder with 8-bit Parallel Prefix Adder", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 8, page no. ppb541-b551, August-2022, Available at : http://www.jetir.org/papers/JETIR2208165.pdf