Quantum-dot Cellular Automata (QCA) is an emerging and promising technology that provides significant improvements over CMOS. Recently QCA has been advocated as an applicant for implementing reversible circuits. However QCA, like other Nanotechnologies, suffers from a high fault rate. The main purpose of this paper is to develop a fault tolerant model of QCA circuits by redundancy in hardware a...

Evolution of microelectronics towards miniaturization is one of the main motivations for Nanotechnology. CMOS Technology has been targeted to integrate more and more Devices per unit area of Silicon-substrate, but there is limitation in scaling-down CMOS Circuits/Devices. Like Nanotechnology, QCA (Quantum-Dot Cellular Automata) is another alternate Technology having ability to reduce the Device...

Quantum dot Cellular Automata (QCA) is a novel and potentially attractive technology for implementing computing architectures at the nano-scale. The basic Boolean primitive in QCA is the majority gate. In this paper we present a novel design for QCA cells and another possible and unconventional scheme for majority gates. By applying these items, the hardware requirements for a QCA design can be...

Most of Exclusive-OR(XOR) logic gates on quantum-dot cellular automata(QCA) is based on configuration of 2-input, and they are hardly to be scalable and exists unbearable noise because they are only focused on decrease of latency and space. In this paper, we propose how to make a scalable logic using a wire crossing technique, and give examples of two expanded XOR gate using typical logic gates...

We investigate the benefit of using ESOP minimization in the synthesis of quantum-dot cellular automata (QCA). We determine the size and delay of multi-input XOR and AND/OR gates when implemented in using 3-input majority gates that are easily realized in QCA, and use our results in our QCAexor estimator tool. We found that most benchmarks have at least one output that can be better minimized u...

Recent experiments have demonstrated a working cell suitable for implementing the quantum-dot cellular automata ~QCA! paradigm. These experiments have been performed using metal-island clusters. The most promising approach to QCA operation involves quasiadiabatically switching the cells. This has been analyzed extensively in gated semiconductor cells. Here we present a metal-island cell structu...

Quantum-dot cellular automata (QCA) are nanoscale digital logic constructs that use electrons in arrays of quantum dots to carry out binary operations. In this paper, a basic building block for QCA will be proposed. The proposed basic building block can be customized to implement classical gates, such as XOR and XNOR gates, and reversible gates, such as CNOT and Toffoli gates, with less cell co...

Quantum-dot Cellular Automata (QCA) technology is a promising alternative nano-scale for CMOS technology. In digital circuits, multiplexer one of the most important components. this study, an efficient and single layer 2 to 1 QCA circuit proposed using majority gate inverter gate. addition, 4 8 circuits are implemented circuit. The developed in QCADesigner tool. According results, 1, utilize 16...

While still relatively “new”, the quantum-dot cellular automata (QCA) appears to be able to provide many of the properties and functionalities that have made CMOS successful over the past several decades. Early experiments have demonstrated and realized most, if not all, of the “fundamentals” needed for a computational circuit – devices, logic gates, wires, etc. This study introduces the beginn...