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A novel ultra-dense and low-power structure for fault-tolerant three-input majority gate in QCA technology

机译:QCA技术中用于容错三输入多数门的新型超密集低功耗结构

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Quantum-dot cellular automata (QCA) is a very interesting nanoscale technology. Ultradense structure and ultralow power consumption are the most important features of QCA compared to CMOS. QCA circuits often suffer from various types of manufacturing defects and are therefore prone to fault. Hence, the design of fault-tolerant circuits in QCA technology is considered a necessity. In this paper, a novel fault-tolerant three-input majority gate is presented using 12 simple and rotated cells in QCA technology. The proposed structure is investigated against all kinds of cell omission, extra-cell deposition, and cell displacement defects. The simulation results are verified by QCADesigner 2.0.3, and it showed 100%, 89.29%, and 100% tolerance against single-cell omission, double-cell omission, and extra-cell deposition, respectively. In addition, the proposed structure is robust against cell displacement defects. Finally, using the proposed structure, a novel coplanar full adder is presented. The results were compared and indicated that the proposed designs are more reliable than the existing designs. Furthermore, QCAPro power estimator tool was employed to estimate the energy dissipation of the proposed structure.
机译:量子点细胞自动机(QCA)是一种非常有趣的纳米技术。与CMOS相比,超密集结构和超低功耗是QCA的最重要特征。 QCA电路通常会遭受各种类型的制造缺陷,因此容易出现故障。因此,认为在QCA技术中设计容错电路是必要的。在本文中,使用QCA技术中的12个简单旋转单元,提出了一种新颖的容错三输入多数门。针对各种细胞遗漏,细胞外沉积和细胞移位缺陷,研究了提出的结构。通过QCADesigner 2.0.3验证了仿真结果,该仿真结果显示出对单细胞遗漏,双细胞遗漏和细胞外沉积的耐受性分别为100%,89.29%和100%。另外,所提出的结构对于细胞位移缺陷是鲁棒的。最后,使用提出的结构,提出了一种新颖的共面全加法器。比较结果表明,所提出的设计比现有设计更可靠。此外,使用QCAPro功率估算器工具来估算所提议结构的能量耗散。

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