REVIEW ON VARIOUS FULL ADDER CIRCUITS

This paper explores different Full adder techniques such as Transmission Gate(TG) logic, Complementary pass transistor logic(CPL), Complementary metal oxide semiconductor(CMOS), Gate diffusion input (GDI) and Modified GDI (Gate Diffusion Input) logic. The main objective is find full adders providing low powered and high-speed with good voltage swing. GDI (Gate Diffusion Input) is one of the area effective, high speed and low power technique. It needs smallest amount of transistors as compared to conventional CMOS technology. But the drawback of GDI (Gate Diffusion Input) is that its output has poor logic swing. Modified Gate diffusion technique overcomes this problem.