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A creative concept for designing and simulating quaternary logic gates in quantum-dot cellular automata

Frontiers of Information Technology & Electronic Engineering 2021年第11期22卷 1541-1550页

作者： Alireza NAVIDI Reza SABBAGHI-NADOOSHAN Massoud DOUSTI Department of Electrical and Computer Engineering Science and Research BranchIslamic Azad UniversityTehran***Iran Department of Electrical Engineering Central Tehran BranchIslamic Azad UniversityTehran***Iran

New technologies such as quantum-dot cellular automata(QCA) have been showing some remarkable characteristics that standard complementary-metal-oxide semiconductor(CMOS) in deep sub-micron cannot afford. Modeling systems and designing multiple-valued logic gates with QCA have advantages that facilitate the design of complicated logic circuits. In this paper, we propose a novel creative concept for quaternary QCA(QQCA). The concept has been set in QCASim, the new simulator developed by our team exclusively for QCAs’ quaternary mode. Proposed basic quaternary logic gates such as MIN, MAX, and different types of inverters(SQI, PQI, NQI, and IQI) have been designed and verified by QCASim. This study will exemplify how fast and accurately QCASim works by its handy set of CAD tools. A 1×4 decoder is presented using our proposed main *** points such as the minimum delay, area, and complexity have been achieved in this work. QQCA main logic gates are compared with quaternary gates based on carbon nanotube field-effect transistor(CNFET). The results show that the proposed design is more efficient in terms of latency and energy consumption.

关键词： Quantum-dot cellular automata(QCA) quaternary logic QCASim quaternary QCA(QQCA) quaternary decoder quaternary gates

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