Comparison of 4 bit adders in CMOS and GDI logic

EasyChair Preprint 3374

Abstract

Circuit Performances in VLSI technology always depends up on the individual processing elements and the interconnections in the circuit. Adders are the key elements in all digital systems which perform addition of numbers. Here this work focus on performance comparison of existing CMOS logic and new GDI(Gate Diffusion Input)  technology by designing 4-bit adders such as Ripple Carry Adder (RCA), Carry Save Adder (CSA) and Carry-lookahead Adder (CLA). Performance analysis of adders is presented with respect to layout area, transistor count, number of devices and delays are discussed. All adders are designed using Tannerv15.2 with 180 nm technology. Simulation results shows that proposed GDI 4-bit adders are more efficient in terms of area and delay when compares to CMOS logic.

Keyphrases: CMOS, GDI, VLSI

@booklet{EasyChair:3374,
  author    = {K. S. Sifna and M. Chinchu},
  title     = {Comparison of 4 bit adders in CMOS and GDI logic},
  howpublished = {EasyChair Preprint 3374},
  year      = {EasyChair, 2020}}