Design of new single-bit multilayer ALU in QCA technology

Nowadays, the CMOS technology is faced with limitations such as short channel effects. The new nanotechnology, QCA technology, is a promising candidate to replace the CMOS technology. This technology can be used for efficient digital circuits design. The ALU circuit is a significant digital circuit that can be developed in this technology. This paper proposes a new single-bit QCA Multilayer ALU (MALU), which has 4 inputs and 3 outputs. This MALU can execute 5 operations including subtraction, addition, OR, AND, and XOR. The functionality of the proposed single-bit MALU has been verified using QCADesigner tool. The results confirm that the proposed QCA MALU has 0.19 mu m2 area, 235 cells, 8.17 meV energy, 3 clock cycles delay, and 0.109 nW average power dissipation. Moreover, the comparison demonstrates that the suggested single-bit QCA MALU circuit provides advantages when considering of energy, area, latency, and cost as compared to previously QCA ALU circuits.