Md. Abdullah-Al-Shafi

Optimized design and performance analysis of novel comparator and full adder in nanoscale

Abstract In a vastly rapid progress of very large scale integration (VLSI) archetype, it is the requirement of moment to attain a consistent model with swifter functioning speed and low power utilization. Quantum-dot Cellular Automata (QCA) is an inimitable transistorless computation approach that is based on semiconductor substantial and a substitute for customary CMOS and VLSI archetype at nanoscale point which comprises a better switching frequency, enhanced scale integration and small extent. In the design of digital logic, a comparator is the essential forming component which implements the resemblance of two numbers and a binary full adder is a major entity in digital logic systems. This paper deals with an expanded layout of reversible 1-bit comparator and proficient full adder without wire-crossing in QCA. The proposed layouts are significantly declined in terms of area and cell complexity, assessed to other layouts and clock cycle is retained at least. Quantum costs of the proposed circuits are estimated and compared, that shows the proposed QCA layouts have lesser quantum cost equated to regular designs and the energy depletion by the circuits endorses the view of QCA nano-circuit attending as a substitute level for the completion of reversible computing. Under thermal unpredictability, the constancy of the proposed designs is evaluated which show the operating efficacy of the designs. The simulation outcomes in QCADesigner tool approve that the presented designs performs properly and can be operated as an extreme performing design in QCA technology.

QCA: An effective approach to implement logic circuit in nanoscale

Typical lithography based VLSI technology employed to elevate higher scale assimilation, low powered computing and better switching frequency of semiconductor constituents. Yet, the tendency encounters severe threats because of major physical bounds of Complementary Metal Oxide Semiconductor (CMOS) technology as tunneling concern, doping variations at nanoscopic scale and short channel issue. Quantum-dot cellular automata (QCA) is a promising nanotechnology which offers a unique approach to evade the transistor concept to design molecular scale computing components and presents a novel method of information shift. Reversible logic circuit is obtained to be low power architecture that turns into developing technology in low-power nanotech. In this work, an efficient layout of logic and arithmetic circuit using QCA is presented where the circuits are formed using least number of QCA cells as well as no crossover.

Power analysis dataset for QCA based multiplexer circuits

Power consumption in irreversible QCA logic circuits is a vital and a major issue; however in the practical cases, this focus is mostly omitted.The complete power depletion dataset of different QCA multiplexers have been worked out in this paper. At −271.15 °C temperature, the depletion is evaluated under three separate tunneling energy levels. All the circuits are designed with QCADesigner, a broadly used simulation engine and QCAPro tool has been applied for estimating the power dissipation.

Performance evaluation of efficient combinational logic design using nanomaterial electronics

Abstract Scaling down trend of CMOS transistor is approaching its lowest point, the rational substitute for the CMOS technology to attain advance improvements in terms of size, low power, and device density usage is an imperative essential. Due to the several physical limitations and circuit bounds of CMOS technology, it is the requirement of a new possible consistent model, that has small area, high device density and low power consumption. Quantum-dot Cellular Automata (QCA) is a novel approach in this direction. This paper presents a new design of 2:4 Decoder, 2:1 Multiplexer, D-Flipflop based on QCA. In addition, a nano communication circuit has been proposed which is proficient as compared to previous designs. Hamming distance approach has been used to perform the power calculations of the proposed circuits. To authenticate the functionality of the proposed designs computational simulation results has been performed using the QCAdesigner tool.

Dataset demonstrating the temperature effect on average output polarization for QCA based reversible logic gates

Quantum-dot cellular automata (QCA) is a developing nanotechnology, which seems to be a good candidate to replace the conventional complementary metal-oxide-semiconductor (CMOS) technology. In this article, we present the dataset of average output polarization (AOP) for basic reversible logic gates presented in Ali Newaz et al. (2016) [1]. QCADesigner 2.0.3 has been employed to analysis the AOP of reversible gates at different temperature levels in Kelvin (K) unit.

Ultra-efficient design of robust RS flip-flop in nanoscale with energy dissipation study

Abstract By the gradual increasing of the attribute size and energy utilization in VLSI chips the component of energy depleted owing to information forfeiture in irreversible valuations will turn into a crucial drawback in the future. Nano components, particularly quantum-dot cellular automata (QCA), have attained extensive interests for their foremost aspects as contrasted to the typical complementary metal oxide semiconductor (CMOS) circuits. QCA, especially due to its substantial diminution in latency, dimension, and energy utilization of circuits, is counted as a latent substitute for the CMOS technology. In this study, a design of RS flip-flop circuit in QCA is proposed. We review an approach for simplified outline of QCA circuits such that the dimensions and energy depletion are substantively decreased. The designed circuit is carried out using single layer and does not involve any rotated cells which particularly expand the fabrication of the outline. The proposed design is simulated with QCADesigner and energy utilization is estimated using QCAPro tool which is a widespread simulation tool. Assessments specify that the outlined structure significantly reduces the number of cells, extent, and latency and depletes very low power which simplifies the complete circuit manufacture and implementation.

Average output polarization dataset for signifying the temperature influence for QCA designed reversible logic circuits

Quantum-dot cellular automata (QCA) as nanotechnology is a pledging contestant that has incredible prospective to substitute complementary metal–oxide–semiconductor (CMOS) because of its superior structures such as intensely high device thickness, minimal power depletion with rapid operation momentum. In this study, the dataset of average output polarization (AOP) for fundamental reversible logic circuits is organized as presented in (Abdullah-Al-Shafi and Bahar, 2017; Bahar et al., 2016; Abdullah-Al-Shafi et al., 2015; Abdullah-Al-Shafi, 2016) [1–4]. QCADesigner version 2.0.3 has been utilized to survey the AOP of reversible circuits at separate temperature point in Kelvin (K) unit.