Content addressable memory cell in quantum-dot cellular automata

Heikalabad, Saeed Rasouli; Navin, Ahmad Habibizad; Hosseinzadeh, Mehdi

doi:10.1016/j.mee.2016.06.009

Cited by 61 publications

(34 citation statements)

References 30 publications

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“…Quantum Logical Circuit has several logical gates, among which XOR Gate is one [17,18]. XOR gate is used in many circuits, so it is very important.…”

Section: Xor Gatementioning

confidence: 99%

A new efficient non-reversible 4 bit binary to gray and 4 bit gray to binary converter in QCA

Islam¹,

Jahan²,

Bahar³

et al. 2018

Nanosystems: Phys. Chem. Math.

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The present Very Large Scale Integration (VLSI) technology is based on Complementary Metal-oxide-Semiconductor (CMOS) technology. The development of the VLSI technology has reached its peak due to the fundamental physical limits of CMOS technology. The recent challenges, as well as the physical limitation of the traditional CMOS technology, has overcome by the Quantum-dot Cellular Automata (QCA) which is first introduced by C. S. Lent. The nanoscale size quantum cell is a feature of QCA technology. In this paper, we propose a new QCA structure for 4-bit binary to 4-bit gray and 4-bit gray to 4-bit binary using two input XOR gate. These structures are designed and simulated with QCA designer and compared with previous structure.

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“…Quantum Logical Circuit has several logical gates, among which XOR Gate is one [17,18]. XOR gate is used in many circuits, so it is very important.…”

Section: Xor Gatementioning

confidence: 99%

A new efficient non-reversible 4 bit binary to gray and 4 bit gray to binary converter in QCA

Islam¹,

Jahan²,

Bahar³

et al. 2018

Nanosystems: Phys. Chem. Math.

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“…There is relatively low‐energy dissipation since there is negligible energy dissipation during the propagation and state transition in QCA 4–6 . QCA technology is being explored exhaustively, and various logics such as adders, 7–14 code converters, 15–18 sequential circuits, 19–23 and memories 24–27 are being proposed for various applications. One such area considered of application is secure transmission of information.…”

Section: Introductionmentioning

confidence: 99%

Design of quantum‐dot cellular automata technology based cost‐efficient polar encoder for nanocommunication systems

Ahmed

Naz

Bhat

2020

Int J Communication

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SummaryIn the current digital era, there is a need of secure and efficient nanocommunication systems with ultralow power consumption. One technology that can be used for designing these systems is the quantum‐dot cellular automata (QCA). In the nanoregime, QCA is able to operate with higher speed and lower power dissipation compared with complementary metal oxide semiconductor technology. This work explores the applicability and feasibility of polar encoders, which felicitates reliable data communication with reduced probability of error, in nanocommunication systems. In this paper, (8,4) polar encoder is proposed in QCA technology. The proposed design is a single‐layer structure designed using only 600 cells consuming cell area of 0.1944 μm2 and total area of 0.7225 μm2 with a latency of 3.75 clock cycles, which results in a cost of 10.16. Based on the performance comparison, it is observed that the proposed design is cost‐efficient and achieves improvement up to 49.49% in terms of number of cells and area consumption, 40% improvement in latency, and 86.42% improvement in terms of cost compared with the only design in the literature. In addition to this, the energy dissipation analysis of the proposed designs is also presented. Hence, the proposed designs can be efficiently utilized in nanocommunication systems requiring minimal area and ultralow power consumption.

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“…The primary element in QCA is a four dots square cell and two additional electrons. Because of the Columbic interaction, these electrons settle inside the dots in a diagonal position [3]. QCA designers have spent a lot of time trying to design circuits in QCA with low complexity.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, CAM is described, which is different from RAM, since in CAM the memory location is accessed by its content. CAM is a special type of memory used in high-speed applications where it is possible to significantly reduce the time spent searching for a stored item in memory if the data stored can be identified by the content rather than the addresses [3].…”

Section: Introductionmentioning

confidence: 99%

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

Majeed¹,

Zainal²,

Alkaldy³

et al. 2020

IJIE

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Quantum-dot Cellular Automata (QCA) technology is one of the most important new nanotechnologies and is a suitable replacement for CMOS circuits. Majority gate and Inverter are the primary building blocks in QCA circuits. Content Addressable Memory (CAM) is a type of memory used in applications that require high speed. In this paper, a novel five input majority gate is introduced. This gate is simulated with QCADesigner tool and compared with previous same structures. Then, the proposed gate used to design a CAM cell in a single layer after deriving the minority gate from the proposed majority gate. The proposed CAM cell has a simple and robust structure and does not require wire crossover, also it reduces circuit complexity by 7% in term of cell count compared to existing structures.

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Content addressable memory cell in quantum-dot cellular automata

Cited by 61 publications

References 30 publications

A new efficient non-reversible 4 bit binary to gray and 4 bit gray to binary converter in QCA

A new efficient non-reversible 4 bit binary to gray and 4 bit gray to binary converter in QCA

Design of quantum‐dot cellular automata technology based cost‐efficient polar encoder for nanocommunication systems

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

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