Novel Counter Design Utilizing QCA Based D Flip-Flops
Garima Goyal, Ashwani Kumar Rana · 2024
In the evolving world of digital circuit design, Quantum-dot Cellular Automata (QCA) stands out as a game-changing approach that offers great improvements in size, power saving, and efficient use of space. This paper thoroughly investigates new QCA circuits, including a redesigned Divide by 2 Frequency Divider and the first Mod 2 Ring Counter ever made using QCA. Both circuits use QCA-based D Flip-Flops. The Divide by 2 Frequency Divider circuit has a cleaner, more efficient design, using 9 cells less than what was used before, showing a big improvement in design. At the same time, we designed a Mod 2 Ring Counter circuit using QCA technology, which is very compact with only 72 cells, making it a major step forward in this area. We looked at how these circuits perform, how stable they are when the temperature changes, and how little space they need, all of which highlight the overall advantages of QCA technology. An important part of our research compares the power used by our QCA designs to the power used by traditional CMOS designs. The QCA versions of the Divide by 2 Counter and Mod 2 Ring Counter use significantly less power, only 3.62e-22 Watts and 3.63e-22 Watts, which is much less compared to the CMOS versions' 0.085 Watts and 0.079 Watts. These results, confirmed using Verilog simulation and Xilinx Vivado tools, show that QCA is much better than CMOS technology when it comes to saving power. This research doesn't just introduce new QCA circuit designs but also creates a new standard for saving power in digital circuits.