A new coplanar design of a 4-bit ripple carry adder based on quantum-dot cellular automata technology

IF 1 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Iet Circuits Devices & Systems Pub Date : 2021-05-24 DOI:10.1049/cds2.12083

Saeid Seyedi, Behrouz Pourghebleh, Nima Jafari Navimipour

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引用次数: 14

Abstract

Quantum-dot cellular automata (QCA) is one of the best methods to implement digital circuits at nanoscale. It has excellent potential with high density, fast switching speed, and low energy consumption. Researchers have emphasized reducing the number of gates, the delay, and the cell count in QCA technology. In addition, a ripple carry adder (RCA) is a circuit in which each full adder's carry-out is the connection for the next full adder's carry-in. These types of adders are quite simple and easily expandable to any desired size. However, they are relatively slow because carries may broadcast across the entire adder. Therefore, an RCA design on a nanoscale QCA is proposed to diminish the cell number, improve complexity, and decrease latency. The QCADesigner simulation tool is used to verify the correctness of the suggested circuit. The comparison results for the design indicate an approximately 49.14% improvement in cell number and 14.29% advantage in area for the state-of-the-art 4-bit RCA designs with QCA technology. In addition, the obtained results specify the effectiveness of the offered design.

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基于量子点元胞自动机技术的4位纹波进位加法器共面设计

量子点元胞自动机(QCA)是实现纳米数字电路的最佳方法之一。它具有密度高、开关速度快、能耗低等优点，具有良好的发展潜力。研究人员强调在QCA技术中减少门的数量、延迟和细胞计数。此外，纹波进位加法器(RCA)是一种电路，其中每个全加法器的进位是下一个全加法器的进位的连接。这些类型的加法器非常简单，很容易扩展到任何所需的大小。然而，它们相对较慢，因为载波可能在整个加法器上广播。因此，提出了一种基于纳米级QCA的RCA设计，以减少细胞数量，提高复杂性并降低延迟。利用qcaddesigner仿真工具验证了所提电路的正确性。设计的比较结果表明，采用QCA技术的最先进的4位RCA设计在小区数量上提高了约49.14%，面积上提高了14.29%。此外，所获得的结果表明了所提供设计的有效性。

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来源期刊

Iet Circuits Devices & Systems 工程技术-工程：电子与电气

CiteScore

3.80

自引率

7.70%

发文量

审稿时长

3 months

期刊介绍： IET Circuits, Devices & Systems covers the following topics: Circuit theory and design, circuit analysis and simulation, computer aided design Filters (analogue and switched capacitor) Circuit implementations, cells and architectures for integration including VLSI Testability, fault tolerant design, minimisation of circuits and CAD for VLSI Novel or improved electronic devices for both traditional and emerging technologies including nanoelectronics and MEMs Device and process characterisation, device parameter extraction schemes Mathematics of circuits and systems theory Test and measurement techniques involving electronic circuits, circuits for industrial applications, sensors and transducers