Published Paper Details:

The design proposes energy efficient arithmetic circuits uses placement of QCA cells. These designs use novel logic circuitry called majority logic function and input re-ordering circuits. These circuits reduce the hardware circuitry and hence reduce the area occupancy. Quantum dot cellular automata are emerging nanotechnology that reduces the cell area, and power dissipation compared to CMOS architectures. The approximate full adders show notable improvements in terms of size, power consumption and energy dissipation. Conjunction of approximate computing and emerging nanotechnology could lead to very powerful and energy efficient integrated infrastructures. Considering two different adder designs such as conventional full adder and approximate full adder. In a complete adder circuit, three one-bit values are added; two of the three bits are known as operands and the third is referred to as the bit ????????????. Output ???????????????? and sum are terms used to describe the 2-bit output that is generated. For approximate adders the hardware metrics like error distance, mean error distance and relative mean error are correlated. Optimized multiplexer to conventional multiplexer methods in terms of cell count, area clock delays and energy consumption.QCAD software used to stimulate the circuits and its waveforms. QCAD-E software is used to calculate the circuit values such as no of cells, area occupancy, total simulation time, energy dissipation