A Content-Addressable Memory Structure using Novel Majority Gate with 5-input in Quantum-dot Cellular Automata

In the past few years, CMOS semiconductor has been a growing and evolving technology in VLSI. However, due to the scaling issue and some other constraints like heat generation, high power consumption QCA (quantum cellular automata) emerged as an alternate and enhanced solution that provides a new technique of computing than CMOS in recent years. QCA is highly effective in implementing both Irreversible and Reversible logic, which has been shown to be incredibly efficient in terms of power consumption. A novel technique to data encryption called as SCV (select, cross, and variation) is demonstrated in this paper, which is based on ASCII to binary conversion and uses reversible logic. The data security procedure is aided by implementing SCV logic in reversible logic. Using Fredkin gate, it is built in QCA. QCADesigner tool has been used here for design and verification purposes. Total 80 cell counts and 0.14 μm 2 area are required. The theoretical data and the simulation results are the same as the intended circuit. Comparison to previous QCA architectural features is featured. K E Y W O R D Scross and variation (SCV method), data encryption, fredkin Gate, quantum-dot cellular automata (QCA), reversible Gate, selectThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…It adjusts to the majority of surrounding coulomb forces. For the inputs (a; b; and c) the majority voter expression is as follows: [15].

MV (normala, normalb, normalc) = a b + b c + c a

…”

Section: Introductionmentioning

confidence: 99%

RSCV: Reversible Select, cross and variation architecture in quantum‐dot cellular automata

Kundu

Das

2022

IET Quantum Communication

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“…The basic building unit in QCA technology is a tiny square cell. This cell contains four holes with two injected electrons (Ali Hussien et al , 2020). Electrons can tunnel between dots.…”

Section: Introductionmentioning

confidence: 99%

A new approach to bypass wire crossing problem in QCA nano technology

Majeed

Alkaldy

2021

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Purpose This study aims to replace current multi-layer and coplanar wire crossing methods in QCA technology to avoid fabrication difficulties caused by them. Design/methodology/approach Quantum-dot cellular automata (QCA) is one of the newly emerging nanoelectronics technology tools that is proposed as a good replacement for complementary metal oxide semiconductor (CMOS) technology. This technology has many challenges, among them being component interconnection and signal routing. This paper will propose a new wire crossing method to enhance layout use in a single layer. The presented method depends on the central cell clock phase to enable two signals to cross over without interference. QCADesigner software is used to simulate a full adder circuit designed with the proposed wire crossing method to be used as a benchmark for further analysis of the presented wire crossing approach. QCAPro software is used for power dissipation analysis of the proposed adder. Findings A new cost function is presented in this paper to draw attention to the fabrication difficulties of the technology when designing QCA circuits. This function is applied to the selected benchmark circuit, and the results show good performance of the proposed method compared to others. The improvement is around 59, 33 and 75% compared to the best reported multi-layer wire crossing, coplanar wire crossing and logical crossing, respectively. The power dissipation analysis shows that the proposed method does not cause any extra power consumption in the circuit. Originality/value In this paper, a new approach is developed to bypass the wire crossing problem in the QCA technique.

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“…2 shows the majority voter, which is constructed from five cells and can form AND and OR operations by fixing one of the five inputs to polarization -1 and +1, respectively. The majority block in high order, meaning more than three inputs, has also been studied in previous work (Kassa and Nagaria, 2016, Majeed et al, 2020a, Sasamal et al, 2016, Majeed et al, 2019b. A chain of cells represents a binary wire where each cell must adopt the same polarization as the preceding cell, based on the principle of electron repulsion, as demonstrated in Fig.…”

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confidence: 99%

Highly Efficient Inverter Blocks in Qca Technology

Majeed,

Khosroshahy

2024

Kufa J. Eng.

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QCA technology presented as a new paradigm to replace CMOS technology in the nanoscale. QCA technology represents binary information by cell polarization, not as a voltage level. The basic blocks in QCA technology are the majority gate and inverter. Efficient building blocks are important to get whole efficient circuits. This article aims to present novel configurations for the inverter block that offer advantages in terms of temperature tolerance, cell count, and area efficiency. Moreover, a Repeater gate with high efficiency is proposed to demonstrate their versatility. The proposed inverter has efficient improvements by 2%, 4.4%, 11%, and 17.5% over the best-reported inverter block at 10 K, 100 K, 150 K, and 200 K, respectively. The circuits presented in this study were designed and validated using QCADesigner software v 2.0.3, and the energy consumption of the proposed designs was assessed using QCAPro tools.

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A Content-Addressable Memory Structure using Novel Majority Gate with 5-input in Quantum-dot Cellular Automata

Cited by 6 publications

References 20 publications

RSCV: Reversible Select, cross and variation architecture in quantum‐dot cellular automata

RSCV: Reversible Select, cross and variation architecture in quantum‐dot cellular automata

A new approach to bypass wire crossing problem in QCA nano technology

Highly Efficient Inverter Blocks in Qca Technology

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