Conference Proceeding

Simulation-based design of modular QCA Circuits

Dept of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA
08/2005; DOI:10.1109/NANO.2005.1500819 pp.533 - 536 vol. 2 In proceeding of: Nanotechnology, 2005. 5th IEEE Conference on
Source: IEEE Xplore

ABSTRACT The design of quantum-dot cellular automata (QCA) circuits and systems is still in an infancy stage; a modular technique which relies on building blocks referred to as tiles, is proposed in this paper. This approach consists of first analyzing the logic capabilities of the basic tiles (inclusive of simulation) followed by logic mapping and connecting the tiles to form the desired circuit. The 3×3 QCA grid is presented as an example of basic block. Five types of tiles can be constructed using the 3×3 grid. A logic characterization of these tiles is presented by using a coherence vector simulation engine. It is shown that the 3×3 grid is not only area efficient, but it also offers versatile logic operation. Various QCA circuits designed using the tile-based method are presented and compared with conventional gate-based design as well as the SQUARES methodology.

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Keywords

basic block
 
basic tiles
 
building blocks
 
coherence vector simulation engine
 
conventional gate-based design
 
desired circuit
 
infancy stage
 
logic capabilities
 
logic characterization
 
quantum-dot cellular automata
 
SQUARES methodology
 
tile-based method
 
tiles
 
Various QCA circuits
 
versatile logic operation
 

J Huang