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A Brief Survey on QCA and CMOS Technology

Ravi Tiwari, Aparajita Singh

Quantum Dot Cellular Automata (QCA) is the latest emerging innovation in the nanotech field. This technology is coming as a successful alternative platform to CMOS (Complementary Metal Oxide Semiconductor) technology. Nowadays, in this technical era, we are used to gadgets. The technical journey is a platform dependent or biased parameter. In the technical field growth and development depend on the way gadgets are being used by the users. The other parameters that play an important role in this context are the application of gadgets in a versatile manner. We are habituated by the use of technical gadgets so; it is well understood that the development of any technology platform depends on the rate of increasing demand of users for more and more flexibility and comfort. This comfort zone of human beings leads us to the generation of inventions and discoveries for better consequences in the technical era. The flexibility of the technical platform of unbiased parameters shapes the development journey of the platform. The best part of the technical platform is considered according to its power consumption or power dissipation parameter. In this context, QCA has proved itself the best alternative to CMOS. The digital logic circuits are mainly designed by QCA. These circuits consume very low power. This is the main key issue of the CMOS platform which is resolved by QCA. There are some best features of QCA that are attracting the attention of lots of researchers. The QCA is used for nanoscale devices. This platform is known for ultra-low power consumption, high packing density, parity generator and parity checker circuit. These circuits are used in nano communication for error detection and correction in the message.