A novel reversible multilayer full adder circuit design in QCA technology
Reza Faraji, Abdalhossein Rezai · Facta universitatis - series Electronics and Energetics · 2024
The QCA technology is a promising kind of nanotechnology that can replace the conventional CMOS technology due to high-speed, high-dense, and low power consumption properties. The QCA technology is based on the Coulomb repulsion and quantum cell instead of using a transistor. The QCA cell is a square structure with 4 dots placed at the square corners and 2 free electrons. The reversible circuits design is a technique that can reduce the power consumption in digital circuits design. In this technique, there is a one-to-one mapping between its input and output vectors. In addition, the input vector can always be formed from the output vector, and conversely, the output vector can also be formed from the input vector. As a result, using reversible technique in QCA digital circuit is an important issue. On the other hand, the full adder plays a vital role in digital circuits design. This paper presents and evaluates a highperformance QCA Reversible Full Adder (RFA) circuit. The developed RFA circuit is implemented in three layers using reversible gates. The functionality of the suggested RFA circuit is evaluated using QCADesigner tool. The results show that the complexity, required area, delay, and average-energy in the developed RFA circuit are 40 cells, 0.016 ?m2, 0.75 clock cycles, and 1.74 meV, respectively. The comparison results demonstrate that the developed RFA circuit outperforms other RFA circuits with regard to area and costs.