QCA: A survey and design of logic circuits

Quantum Dot Cellular Automata (QCA) is one of the new technologies beyond CMOS. Among various other technologies, this is considered to be most feasible and viable due to its area and power advantages. In this paper the discussion about the origin and progress of research works is carried out with respect to QCA domain. Starting from the basic gate study and designing of Adders few other functional blocks are also discussed. This paper proposes QCA as it is considered as the upcoming technology after the saturation of CMOS technology. QCA is considered so due to its advantages in area, power and timing requirements. This domain is still under research and has not been carried to large extent. Hence the authors have made an attempt in exploring it through designing and have simulated the proposed designs. the working of the design is proved through the simulation results.