https://doi.org/10.1140/epjp/s13360-024-05060-y
Regular Article
Novel multiplexer, latch, and shift register in QCA nanotechnology for high-speed computing systems
1
Department of Electrical and Computer Engineering, Nour Branch, Islamic Azad University, 4641859557, Nour, Iran
2
Department of Electrical Engineering, Faculty of Engineering and Technology, University of Mazandaran, Babolsar, Iran
Received:
14
November
2023
Accepted:
4
March
2024
Published online:
16
March
2024
The current research goal is set to provide efficient design and a practical arrangement of the multiplexer, D-latch, and shift register in the quantum-dot cellular automata (QCA) technology. In the proposed multiplexer, including 14 cells, an area of 0.01 
, a 0.5 clock cycle delay, and an energy consumption of 17.31 
, the number of cells and energy consumption rates are reduced by 6.66 and 7.53% compared to the previous designs. Also, a D-latch is designed in this paper using the proposed multiplexer, which has been improved dramatically compared to the previously proposed methods. The proposed D-latch with 24 cells, an area of 0.02 , a 0.5 clock cycle delay, and energy consumption of 26.18 reduced the delay and energy consumption rates, respectively, by 50 and 16.14% in comparison with the best previous designs. The reset and set terminals are also added to the proposed D-latch. The designed D-latches were used in a 4-bit shift register to demonstrate their accurate functioning in more complicated circuits. Accordingly, a 14.28% delay rate reduction resulted. Also, the proposed shift register contains 149 cells, an area of 0.11 , a 1.5 clock cycle delay, and an energy consumption of 156.05 . The simulation of the proposed circuits was made by QCADesigner and QCAPro tools.
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