Firdous Ahmad

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Quantum-dot cellular automata (QCA) is a novel nanotechnology that promises smaller size, lower power consumption, with faster speed and is considered as a solution to the scaling problems in complementary metal oxide semiconductor technology. We propose a novel QCA F-shaped XOR gate. The proposed gate is simple in structure and powerful in terms of(More)
Quantum-dot cellular automaton (QCA) is an emerging, promising, future generation nanoelectronic computational architecture that encodes binary information as electronic charge configuration of a cell. It is a digital logic architecture that uses single electrons in arrays of quantum dots to perform binary operations. Fundamental unit in building of QCA(More)
Quantum-dot Cellular Automata (QCA) is an emerging nanotechnology to reduce size as well as power consumption of switching devices for Very Large Integrated Circuits (VLSI). Moreover QCA circuits offer an advantage of very high device density, high speed, high fan out, and lower circuit complexity. The QCA based circuits have been used for implementations(More)
Quantum-dot cellular automaton (QCA) is an up-coming nanotechnology in the area of nanoelectronics and is found to be an alternative solution to replace conventional CMOS technology for several reasons. It has attractive features such as faster speed, smaller size, and low power consumption compared to transistor-based technology. The experiments carried(More)
In present work, we have implemented the pseudo-code (PN-code) generator using quantum-dot cellular (QCA) technology. Simulation results are obtained from QCA designer software. The PN-code generation is of paramount importance for any secure communication system. The complex code generated is used to scramble incoming plain text. At the receiving end, the(More)
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(More)
After basic mathematical operations i.e. Addition, subtraction, multiplication, and division, square root is regarded as the most useful and applicable operations in scientific calculations. There are various methods for hardware implementation of square root. One of the most common methods in this field is non-restoring algorithm. In this paper, the(More)
Quantum-dot cellular automata, is an extremely small size and a powerless nanotechnology. It is the possible alternative to current CMOS technology. Reversible QCA logic is the most important issue at present time to reduce power losses. This paper presents a novel reversible logic gate called the F-Gate. It is simplest in design and a powerful technique to(More)