A novel ultra‐dense and low‐power structure for fault‐tolerant three‐input majority gate in QCA technology

Ahmadpour, Seyed‐Sajad; Mosleh, Mohammad

doi:10.1002/cpe.5548

Cited by 31 publications

(8 citation statements)

References 51 publications

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“…Recently, Quantum-dot Cellular Automata (QCA) has been known as a promising nanotechnology and become a possible replacement to CMOS technology [2]. Its main aim is to implement rapid processing as well as very low power designs for Nano-sized circuit systems [3]. The designed circuits based on QCA technology have lower power consumption, less occupied area, and lower density [4].…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: A new design for 4-bit RCA using quantum cellular automata technology

Seyedi

Pourghebleh

2022

Opt Quant Electron

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Since the scaling of transistors is growing rapidly, the need for an e cient alternative for the Complementary Metal-Oxide-Semiconductor (CMOS) technology to obtain further and extra processes in the circuits has known as the main problem. Over the last decade, Quantum-dot Cellular Automata (QCA)technology due to its excellent potential in developing designs with low-power consumption, high-speed, and high-density has been recognized as a suitable replacement to CMOS technology. In this regard, lowering the number of gates, the amount of cell count, and delay has been emphasized in the design of QCA-based circuits. Adders as the main unit in logic circuits and digital arithmetic play an important role in constructing various effective QCA designs. In this regard, Ripple Carry Adder (RCA) is a simple form of adders and due to its remarkable features can be useful to reach circuits with the minimum required area and power consumption. Therefore, in this study, a new design for RCA in QCA technology is recommended to reduce the cell count, amend the complexity, and decrease the latency. To verify the correctness of the suggested circuit, the QCADesigner version 2.0.3 as a well known simulator has been used. The evaluation results con rm that the proposed design has approximately 28.6% improvement in cell count in comparison to the state-of-the-art four-bit coplanar RCA designs in QCA technology. Also, the obtained results designate the effectiveness of the advised plan.

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Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: A new design for 4-bit RCA using quantum cellular automata technology

Seyedi

Pourghebleh

2022

Opt Quant Electron

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“…A used 1-bit full adder has been developed by Seyed-Sajad Ahmadpour [39]. Figure 1 displays the used 1-bit QCA full adder block diagram, and Figure 2 illustrates the QCA-based layout of the full adder with a three-input XOR and three-input majority gates [40]. The main block in this design is a three-input XOR gate.…”

Section: Proposed Designmentioning

confidence: 99%

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

Seyedi

Pourghebleh

Navimipour

2021

IET Circuits, Devices & Syst

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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. How to cite this article: Seyedi S, Pourghebleh B, Jafari Navimipour N. A new coplanar design of a 4-bit ripple carry adder based on quantum-dot cellular automata technology. IET Circuits Devices Syst.

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“…Figures 1(a)-(b) provides a visual representation of the fundamental unit of an electrostatic QCA and illustrates two types of binary information encoded using electrons in quantum dots [21]. Electrostatic forces enable adjacent cells to interact, and controllable data directions are provided, usually by a zone-clocking scheme [22]. Four phase-shifted clock signals are employed to scan, switch, hold, release, and relax phases.…”

Section: Introduction To Qca Technologymentioning

confidence: 99%

A new nano-design of 16-bit carry look-ahead adder based on quantum technology

Ahmadpour,

Jafari Navimipour

2023

Phys. Scr.

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There is a requirement and a desire to develop reliable and energy-efficient circuit designs that adapt to the expanding field of low-power circuit engineering in the VLSI domain based on nanotechnology. The quantum-dot cellular automata (QCA) technology possesses the potential to supplant the conventional, complementary metal-oxide-semiconductor (CMOS) technology in low-power nano-scale applications due to its diminutive cell dimensions, dependable circuitry architecture, and robust structural integrity. On the other hand, the carry look-ahead adder (CLA) is one of the vital circuits in digital processing utilized in diverse digital applications. In addition, for the design of this essential circuit, the occupied area and the delay play the primary role because using a simple formulation can reduce the occupied area, energy consumption, and the number of gates count. In the previous structures, high delay and use of traditional technology (like CMOS) caused an increase in the number of gate counts and occupied areas. Using QCA technology, simple quantum cells, and a low delay, all the previous shortcomings can be resolved to reduce the number of gate counts and low occupied area in the CLA circuit. This paper proposes a new method that helps the propagation characteristics generate suitable signals to reduce the number of gate counts based on adders in QCA technology. Several new blocks are used to design fast binary adders. Finally, an optimal four and 16-bit CLA circuit will be proposed based on the adder circuit. Furthermore, the execution and experimentation of outcomes are carried out utilizing QCADesigner-2.0.3. The simulation-based comparison of values justified the proposed design’s accuracy and efficiency. The simulation results demonstrate that the proposed circuit has a low area and quantum cell.

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A novel ultra‐dense and low‐power structure for fault‐tolerant three‐input majority gate in QCA technology

Cited by 31 publications

References 51 publications

RETRACTED ARTICLE: A new design for 4-bit RCA using quantum cellular automata technology

RETRACTED ARTICLE: A new design for 4-bit RCA using quantum cellular automata technology

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

A new nano-design of 16-bit carry look-ahead adder based on quantum technology

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