Nanotechnology
Farzaneh Jahanshahi Javaran; Somayyeh Jafarali Jassbi; Hossein Khademolhosseini; Razieh Farazkish
Abstract
A novel technique for creating logic gates and digital circuitry at the nanoscale is quantum cellular automata (QCA). The sensitivity of the circuit is enhanced and quantum circuits are more susceptible to unfavorable external conditions when component size are reduced. In this article, we offer a five-input ...
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A novel technique for creating logic gates and digital circuitry at the nanoscale is quantum cellular automata (QCA). The sensitivity of the circuit is enhanced and quantum circuits are more susceptible to unfavorable external conditions when component size are reduced. In this article, we offer a five-input majority gate with fault-tolerant feature in QCA technology, taking into account the significance of constructing circuits that can withstand flaws. We also assess all potential defects in the process of arranging cells in specific locations on the surface. These errors consist of extra cells, rotation, deletion, and displacement. The gate under study is subjected to the aforementioned four failure categories in the first stage. The QCADesigner simulator engine is then used to assess the accuracy of the circuit performance in the second step. 41 quantum cells have been used to make the gate of this five-input majority gate with fault-tolerant feature in QCA technology. Several techniques are explored to discover such a majority gate, such as adding cells (i.e., introducing redundancy into the circuit) and particular cell layout techniques. The goal is to come up with a design that can ideally withstand possible faults with the least amount of overhead on the circuit for fault-tolerant through a certain cell layout. The findings demonstrate the implemented majority gate's notable advantage over comparable scenarios.
Nanotechnology
Faezeh Motalebi; Samira Sayedsalehi
Abstract
Quantum-dot Cellular Automata (QCA) is a new technology for eliminating some of the problems of existing technologies such as CMOS. Some of the key advantages of QCA are an intersection of wires in the same plane, high speed, small area, power consumption, complexity and low cost. Employing a three-input ...
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Quantum-dot Cellular Automata (QCA) is a new technology for eliminating some of the problems of existing technologies such as CMOS. Some of the key advantages of QCA are an intersection of wires in the same plane, high speed, small area, power consumption, complexity and low cost. Employing a three-input majority gate, a five-input majority gate and three logic gates, this study presents a full-adder circuit in a single layer which for higher efficiency and avoiding much complexity and based on the function of the intended full-adder circuit, the five-input gate is proposed. The proposed full-adder circuit and the proposed ripple adder circuit are compared with previous designs regarding complexity, number of cells, and area and the results are reported. Moreover, proposed circuits’ power consumption has been calculated by using QCApro. These results indicate that the proposed full adder design in comparison with previous similar design achieved 36%, 20% and 4.4% reduction in the number of cells, latency and power consumption, respectively.
