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Quantum‐dot cellular automata (QCA) is a transistor‐less technology to implement the nanoscale circuit designs. QCA circuits are fast, highly dense and dissipate less energy as compared to widely used complementary metal oxide semiconductor (CMOS) technology. In this paper, a novel structure for digital comparator using QCA nanotechnology is proposed. Digital comparator is a basic and important module...
Quantum‐dot cellular automata (QCA) is an emerging technology to design logic circuits at the nanoscale level. It has the potential to replace the complementary metal oxide semiconductor (CMOS) technology. In this paper, an optimal, single layered, single clocked 1:2 demultiplexer (DeMux) circuit is proposed using 19 QCA cells in QCA technology. Proposed 1:2 DeMux circuit is further utilized for designing...
Downsizing computational modules can be effective in increasing computational speed, reducing energy consumption, and reducing the occupied area of the chip, but limitations associated with Complementary metal–oxide–semiconductor (CMOS) technology downsizing prompted researchers to look for alternative methods for transistors and circuit fabrication. A common issue in many of these methods is the...
Quantum‐dot Cellular Automata (QCA) lead to fundamental changes in nanoscale technology. It promises small area, low power, & high‐speed structures for digital circuit design. This paper presents efficient low power structures of reversible multiplexer & demultiplexer (RMD) modules based on the QCA technology. The simulation result shows that the proposed RMD module has utilized less area...
This work proposes a novel quantum‐dot cellular automata (QCA) layout for an Excess‐3 to BCD code converter for nano systems that is low in cell complexity. The suggested design uses a QCA clock‐phase‐based technique to evaluate integration with other complex circuits. The results obtained using the QCADesigner simulation tool demonstrate the superiority of the recommended layout over prior identical...
This paper presents a reversible nano‐scale decoder circuit. The decoder is designed by utilizing the new quantum‐dot cellular automata (QCA) format of the QCA1 gate. This QCA1 gate provides 34.25% less cell count with 54.37% less area than the best existing designs. Thus, the proposed QCA1 gate provides less area considering the best existing state‐of‐the‐art plans. The IBMQ‐based quantum realization...
This article describes designing a low‐power novel circuit for overflow detection in two's complement arithmetic operations. The quantum‐dot cellular automata (QCA) is employed to achieve the nanoscale design. For designing the circuit of the proposed arithmetic overflow detector, a new layout of the QCA full adder is utilized. Two different designs of arithmetic overflow detectors are outlined in...
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