Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 10 2 2014 06 01 Novel Design of n-bit Controllable Inverter by Quantum-dot Cellular Automata 117 126 6117 EN M. Kianpour Electrical Engineering Department, Islamic Azad University, Science and Research Branch, Tehran, I. R. Iran R. Sabbaghi-Nadooshan Electrical Engineering Department, Islamic Azad University, Central Tehran Branch, Tehran, I. R. Iran Journal Article 2014 01 22 Application of quantum-dot is a promising technology for implementing digital systems at nano-scale. Quantum-dot Cellular Automata (QCA) is a system with low power consumption and a potentially high density and regularity. Also, QCA supports the new devices with nanotechnology architecture. This technique works based on electron interactions inside quantum-dots leading to emergence of quantum features and decreasing the problem of future integrated circuits in terms of size. In this paper, we will successfully design, implement and simulate a new 2-input and 3-input XOR gate (exclusive OR gate) based on QCA with the minimum delay, area and complexities. Then, we will use XOR gates presented in this paper, in 2-bit, 4-bit and 8-bit controllable inverter in QCA. Being potentially pipeline, the QCA technology calculates with the maximum operating speed. We can use this controllable inverter in the n-bit adder/subtractor and reversible gate.

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