Design of novel efficient adder and subtractor for quantum‐dot cellular automata

Hayati, Mohsen; Rezaei, Abbas

doi:10.1002/cta.2019

Cited by 31 publications

(18 citation statements)

References 19 publications

(39 reference statements)

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“…The fault tolerance for the sum output and carry output are 17.94% and 92.30%, respectively in [25]. Hayati and Rezaei [21] have proposed 1-bit FA that utilizes three 3-input MGs and one IG. This 1-bit FA has 0.02 µm 2 area, 38 QCA cells and two clock phases delay.…”

Section: Related Workmentioning

confidence: 99%

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Novel single layer fault tolerance RCA construction for QCA technology

2019

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Quantum-dot Cellular Automata (QCA) technology has become a promising and accessible candidate that can be used for digital circuits implementation at Nanoscale, but the circuit design in the QCA technology has been limited due to fabrication high-defect rate. So, this issue is an interesting research topic in the QCA circuits design. In this study, a novel 3-input Fault Tolerance (FT) Majority Gate (MG) is developed. Accordingly, an efficient 1-bit QCA full adder is developed using the developed 3-input MG. Then, a new 4-bit FT QCA Ripple Carry Adder (RCA) is developed based on the proposed 1-bit FT QCA FA. The developed circuits are implemented in the QCADesigner tool version 2.0.3. The results indicate that the developed QCA circuits provide advantages compared to other QCA circuits in terms of double and single cell missing defect, area and delay time.

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Section: Related Workmentioning

confidence: 99%

“…This 1-bit FA has 0.02 µm 2 area, 38 QCA cells and two clock phases delay. The fault tolerance for the sum output and the carry output are 12.12% and 48.48%, respectively in [21]. Kianpour et al [22] have presented 1-bit FA that utilizes three 3-input MGs and one IG.…”

Section: Related Workmentioning

confidence: 99%

Novel single layer fault tolerance RCA construction for QCA technology

2019

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“…Full‐adders are considered as one of the most important and most widely used digital computing circuitry blocks . However, fault‐tolerant full‐adders in QCA have not been addressed well.…”

Section: Proposed Fault‐tolerant Full‐addersmentioning

confidence: 99%

“…Information is reassigned via columbic exchanges between the fundamental elements (cells) instead of electrical current . Up to now, extensive attempts has been made on the design of various digital circuits such as multipliers, adders, multiplexers, and memories in QCA technology, but according to a study in Bahar et al, the high complexity of nanocircuit structures results in the need to design high fault‐tolerant structures. QCA technology encounters challenges like many defects that were first described in previous works .…”

Section: Introductionmentioning

confidence: 99%

Robust QCA full‐adders using an efficient fault‐tolerant five‐input majority gate

Ahmadpour

Mosleh

Heikalabad

2019

Circuit Theory & Apps

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Quantum-dot cellular automata (QCA) is considered as a top candidate for nanoscale technologies with unique features such as very low occupancy and ultralow power consumption. Despite the potential benefits of QCA technology over CMOS technology, QCA circuits are highly prone to defects. Therefore, a demand has risen in designing fault-tolerant circuits. In this research, a novel fault-tolerant five-input majority gate is first suggested, and then it is evaluated by implementing a variety of faults such as cell omission, cell displacement, and extra-cell deposition. The evaluation results reveal that the proposed structure is 100%, 51.85%, and 18.8% fault-tolerant under extra-cell deposition, single-cell omission, and double-cell omission, respectively. Moreover, two single-layer and coplanar fault-tolerant QCA full-adders are offered using the suggested fault-tolerant structure. The stability of the presented single-layer full-adder has also been investigated under single and double cell omission defects. The evaluation outcomes show that the suggested fault-tolerant single-layer full-adder has a high stability in Sum and C out outputs compared with other full-adders. In order to validate the functionality of the suggested fault-tolerant five-input majority gate, a number of physical investigations are given. The QCADesigner 2.0.3 software has been used to evaluate the simulation results.KEYWORDS five-input majority gate, circuit design, fault-tolerant, full-adders, nanotechnology, quantum-dot cellular automata (QCA)

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“…Adders are the most important part of an arithmetic logic unit (ALU). Several studies have been reported about adders [7][8][9][10][11] and QCA serial adders [12][13][14]. Three designs of QCA serial adders have been presented in the previous studies [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Novel Optimized Designs for QCA Serial Adders

Mostafaee¹,

Rezaei²

2017

IJITCS

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Abstract-Quantum-dot Cellular Automata (QCA) is a new and efficient technology to implement logic Gates and digital circuits at the nanoscale range. In comparison with the conventional CMOS technology, QCA has many attractive features such as: low-power, extremely dense and high speed structures. Adders are the most important part of an arithmetic logic unit (ALU). In this paper, four optimized designs of QCA serial adders are presented. One of the proposed designs is optimized in terms of the number of cells, area and delay without any wire crossing methods. Also, two new designs of QCA serial adders and a QCA layout equivalent to the internal circuit of TM4006 IC are presented. QCADesigner software is used to simulate the proposed designs. Finally, the proposed QCA designs are compared with the previous QCA, CNTFET-based and CMOS technologies.

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Design of novel efficient adder and subtractor for quantum‐dot cellular automata

Cited by 31 publications

References 19 publications

Novel single layer fault tolerance RCA construction for QCA technology

Novel single layer fault tolerance RCA construction for QCA technology

Robust QCA full‐adders using an efficient fault‐tolerant five‐input majority gate

Novel Optimized Designs for QCA Serial Adders

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