Optimum multiplexer design in quantum-dot cellular automata

<p>Quantum-dot Cellular Automata (QCA) is one of the most important computing technologies for the future and will be the alternative candidate for current CMOS technology. QCA is attracting a lot of researchers due to many features such as high speed, small size, and low power consumption. QCA has two main building blocks (majority gate and inverter) used for design any Boolean function. QCA also has an inherent capability that used to design many important gates such as XOR and Multiplexer in optimal form without following any Boolean function. This paper presents a novel design 2:1 QCA-Multiplexer in two forms. The proposed design is very simple, highly efficient and can be used to produce many logical functions. The proposed design output comes from the inherent capabilities of quantum technology. New 4:1 QCA-Multiplexer has been built using the proposed structure. The output waveforms showed the wonderful performance of the proposed design in terms of the number of cells, area, and latency.</p>

Download Full-text

Design and Implementation of Novel Efficient Full Adder/Subtractor Circuits Based on Quantum-Dot Cellular Automata Technology

Applied Sciences ◽

10.3390/app11188717 ◽

2021 ◽

Vol 11 (18) ◽

pp. 8717

Author(s):

Mohsen Vahabi ◽

Pavel Lyakhov ◽

Ali Newaz Bahar

Keyword(s):

Cellular Automata ◽

Quantum Dot ◽

High Speed ◽

Single Layer ◽

Building Blocks ◽

Full Adder ◽

Cmos Technology ◽

Quantum Dot Cellular Automata ◽

Potential Alternative ◽

Nanoscale Level

One of the emerging technologies at the nanoscale level is the Quantum-Dot Cellular Automata (QCA) technology, which is a potential alternative to conventional CMOS technology due to its high speed, low power consumption, low latency, and possible implementation at the atomic and molecular levels. Adders are one of the most basic digital computing circuits and one of the main building blocks of VLSI systems, such as various microprocessors and processors. Many research studies have been focusing on computable digital computing circuits. The design of a Full Adder/Subtractor (FA/S), a composite and computing circuit, performing both the addition and the subtraction processes, is of particular importance. This paper implements three new Full Adder/Subtractor circuits with the lowest number of cells, lowest area, lowest latency, and a coplanar (single-layer) circuit design, as was shown by comparing the results obtained with those of the best previous works on this topic.

Download Full-text

Design of Coplanar Circuit Switching Network in Quantum Dot Cellular Automata

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.d4227.118419 ◽

2019 ◽

Vol 8 (4) ◽

pp. 10611-10619

Keyword(s):

Communication Network ◽

Cellular Automata ◽

Quantum Dot ◽

Reducing Power ◽

Building Blocks ◽

Cmos Technology ◽

Switching Network ◽

Circuit Switching ◽

Quantum Dot Cellular Automata ◽

Crossbar Switch

Quantum dot Cellular Automata (QCA) is the alternative technology to the classic CMOS technology since it is going to attain a road block in reducing power consumption and increase speed of the digital circuits. Circuit switching network is the basic component in order to transmit input signal among the different users within the communication network. A novel crossbar switch is proposed in this paper to design this communication network. The basic building blocks of the proposed circuit Switching network are Crossbar switch, Multiplexer and Demultiplexer. Multilayer QCA cells are almost impossible when compared to the fabrication feasibility of the single layer design. So this design is achieved in single layer.Circuit switching network is designed and compared with existing one using QCA Designer2.0.3.The designs are verified through matching up with truth tables.

Download Full-text

Next Generation Computing Using Quantum Dot Cellular Automata Nano Technology, New Promising Alternative to CMOS

Asian Journal of Computer Science and Technology ◽

10.51983/ajcst-2019.8.s3.2111 ◽

2019 ◽

Vol 8 (S3) ◽

pp. 19-24

Author(s):

Singathala Guru Viswadha

Keyword(s):

Quantum Dots ◽

Cellular Automata ◽

Quantum Dot ◽

Building Blocks ◽

Cmos Technology ◽

Electronic Interaction ◽

Physical Point ◽

Promising Alternative ◽

Processing Technologies ◽

Quantum Dot Cellular Automata

CMOS technology is one of the most popular technology in the computer chip design industry and broadly used today to form integrated circuits in numerous and varied applications and it has transformed the field of electronics. Over the time the design methodologies and processing technologies of CMOS devices have greatest activity with the Moore’s law. Now CMOS technology has to face challenges to survive through the submicron ranges. The scaling in CMOS has reached higher limit, not only from technological and Physical point of view but also from economical and material aspects. This concept inspires the researches to look for new alternatives to CMOS which gives better performance and power consumption. One of the alternative technologies to digital designing in CMOS is the Quantum dot Cellular Automata (QCA). QCA is a technology it works on Electronic interaction between the cells. The QCA cell basically consists of Quantum dots separated by certain distance. The transmission of information done via the interaction between the Electrons present in these quantum dots. In this paper the limitations to CMOS in submicron range and concepts for designing in QCA have been discussed and also the building blocks are explained using QCA designer implementations with focus on cell interaction and clocking mechanism.

Download Full-text

The Role of Magnetic Quantum Dot Cellular Automata In Replacing Traditional CMOS Technology

International Journal of Computer Sciences and Engineering ◽

10.26438/ijcse/v6i8.567570 ◽

2018 ◽

Vol 6 (8) ◽

pp. 567-570

Author(s):

H. Umamahesvari

Keyword(s):

Cellular Automata ◽

Quantum Dot ◽

Cmos Technology ◽

Quantum Dot Cellular Automata

Download Full-text

Towards the Design of Cost-efficient Generic Register Using Quantum-dot Cellular Automata

Nanoscience &Nanotechnology-Asia ◽

10.2174/2210681209666190412142207 ◽

2020 ◽

Vol 10 (4) ◽

pp. 534-547

Author(s):

Chiradeep Mukherjee ◽

Saradindu Panda ◽

Asish K. Mukhopadhyay ◽

Bansibadan Maji

Keyword(s):

Cellular Automata ◽

Quantum Dot ◽

Power Dissipation ◽

Cmos Technology ◽

Oxide Semiconductor ◽

Digital Data ◽

Design Parameters ◽

Flip Flop ◽

Quantum Dot Cellular Automata ◽

Cost Efficient

Background: The advancement of VLSI in the application of emerging nanotechnology explores quantum-dot cellular automata (QCA) which has got wide acceptance owing to its ultra-high operating speed, extremely low power dissipation with a considerable reduction in feature size. The QCA architectures are emerging as a potential alternative to the conventional complementary metal oxide semiconductor (CMOS) technology. Experimental: Since the register unit has a crucial role in digital data transfer between the electronic devices, such study leading to the design of cost-efficient and highly reliable QCA register is expected to be a prudent area of research. A thorough survey on the existing literature shows that the generic models of Serial-in Serial Out (SISO), Serial-in-Parallel-Out (SIPO), Parallel-In- Serial-Out (PISO) and Parallel-in-Parallel-Out (PIPO) registers are inadequate in terms of design parameters like effective area, delay, O-Cost, Costα, etc. Results: This work introduces a layered T gate for the design of the D flip flop (LTD unit), which can be broadly used in SISO, SIPO, PISO, and PIPO register designs. For detection and reporting of high susceptible errors and defects at the nanoscale, the reliability and defect tolerant analysis of LTD unit are also carried out in this work. The QCA design metrics for the general register layouts using LTD unit is modeled. Conclusion: Moreover, the cost metrics for the proposed LTD layouts are thoroughly studied to check the functional complexity, fabrication difficulty and irreversible power dissipation of QCA register layouts.

Download Full-text