Combinational Circuit Design Based on Quantum-Dot Cellular Automata

Abstract

Quantum-dot cellular automata(QCA) provides a new approach in computer circuit design and development at nanotechnology level. This technology promises extraordinary high computing speeds, low heat dissipation and highly dense circuits. In this paper,two 2:4 decodersare proposed. The proposed structures reduce the clock phases to only three phases making them faster than the designs currently available in literature.The first proposed structure has reduced number of cells and hence covers a small area.The second proposed method although it has more cells, has regular clock zones that can facilitate the implementation of this circuit.Simulation of the circuits was done using QCADesigner.

Implementation of Multilayer Based Reversible Gate Using Quantum-Dot Cellular Automata

“…The signal is input from the left side of the binary line and is divided into two parallel lines offset from the original line. Since the input wire extends one cell beyond the beginning of the offset wire, the alignment effect dominates at the branch point [11] [12].…”

Design of Low Hardware Complexity Multiplexer Using NAND Gates on Quantum-Dot Cellular Automata

“…The value in an inverter chain changes from "1" to "0" and vice versa as it moves along the wire. [12][13]. Figure 2(c) shows an arrangement of cells that acts as an inverter.…”

Low Complexity QCA Binary to Gray Code Converter

“…Quantum-dot cellular automata (QCA), a new technology that can replace this problem, is a molecular or atom-level nanoscale device that consumes extremely low power and is attracting attention in the next generation of electronic circuit design [2]. QCA is first introduced by Lent et al QCA has been designed in various structures such as basic combination and sequential logic circuits [3][4][5][6][7]. This paper is organized in five sections.…”