Adder Designs and Analyses for Quantum-Dot Cellular Automata

Quantum-dot cellular automata (QCA) is an emerging nanotechnology for electronic circuits. Its advantages such as faster speed, smaller size, and lower power consumption are very attractive. The fundamental device, a quantum-dot cell, can be used to make gates, wires, and memories. As such it is the...

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Bibliographic Details
Published in:IEEE transactions on nanotechnology 2007-05, Vol.6 (3), p.374-383
Main Authors: Cho, H., Swartzlander, E.E.
Format: Article
Language:English
Subjects:
Adder
Adders
Applied sciences
Automata. Abstract machines. Turing machines
carry lookahead adder
Cellular automata
Circuit analysis
Circuit design
Circuit properties
Circuit synthesis
Circuits
Computer science
control theory
systems
conditional sum adder
Devices
Digital circuits
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Energy consumption
Exact sciences and technology
Integrated circuits
Integrated circuits by function (including memories and processors)
layout
logic design
Molecular electronics, nanoelectronics
Nanostructure
Nanostructured materials
Nanotechnology
Quantum cellular automata
Quantum dots
quantum-dot cellular automata (QCA)
ripple carry adder
Ripples
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
simulation
Theoretical computing
Wires
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Summary:Quantum-dot cellular automata (QCA) is an emerging nanotechnology for electronic circuits. Its advantages such as faster speed, smaller size, and lower power consumption are very attractive. The fundamental device, a quantum-dot cell, can be used to make gates, wires, and memories. As such it is the basic building block of nanotechnology circuits. While the physical nature of the nanoscale materials is complicated, the circuit designer can concentrate on the logical and structural design, so the design effort is reduced. Because of its novelty, the current literature shows only simple circuit structures. So this paper broadens the QCA circuit designs with larger circuits and shows analyses based on those designs. This paper proposes three kinds of adder designs in QCA. Ripple carry adders, carry lookahead adders, and conditional sum adders are designed and simulated with several different operand sizes. The designs are compared according to complexity, area, and delay
ISSN:1536-125X
1941-0085
DOI:10.1109/TNANO.2007.894839