A Review Paper on Different Full Adder Cells

Abstract

Full adder cell is a foremost functional unit which is used in various domains such as image processing, signal processing, digital communications and etc... In this paper, Gate Diffusion input (GDI), Transmission Gate logic (TGL) and Multi-threshold Voltage Gate Diffusion Input (MVT-GDI) based full adder cell designs are reviewed. Even though there were many existing techniques are available, the Multi-threshold Voltage Gate Diffusion full adder circuit consists of both MVT-GDI and TGL. The competences of different full adders are reviewed interns of power and speed. GDI is one of the area efficient techniques. It is mainly and extensively used in Very Large Scale Integration (VLSI) technology as compared with CMOS conventional technology.