Analytical Comparison of Power Efficient and High Performance Adders at 32 nm Technology

In this paper, analytical comparison of full adders has been presented on the basis of power, delay and PDP. All simulations are performed using SPICE in 32 nm CMOS technology. Full adder is the basic block of an arithmetic logic unit (ALU) so the power consumption and delay of an ALU are reduced by optimizing full adder. Simulation results show that for input to output carry FA-Tung has the highest speed and the lowest PDP. While for input to output sum, FA-Goel has the highest speed and the lowest PDP. FA-Conventional has the highest power consumption while FA-Tung has the lowest power consumption. For multi-bit adders, FA-Tung has the best performance.