Open Access Nano Express

Two-layer synchronized ternary quantum-dot cellular automata wire crossings

Iztok Lebar Bajec* and Primož Pečar

Author Affiliations

Faculty of Computer and Information Science, University of Ljubljana, Tržaška cesta, Slovenia

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Nanoscale Research Letters 2012, 7:221  doi:10.1186/1556-276X-7-221

Published: 16 April 2012

Abstract

Quantum-dot cellular automata are an interesting nanoscale computing paradigm. The introduction of the ternary quantum-dot cell enabled ternary computing, and with the recent development of a ternary functionally complete set of elementary logic primitives and the ternary memorizing cell design of complex processing structures is becoming feasible. The specific nature of the ternary quantum-dot cell makes wire crossings one of the most problematic areas of ternary quantum-dot cellular automata circuit design. We hereby present a two-layer wire crossing that uses a specific clocking scheme, which ensures the crossed wires have the same effective delay.

Keywords:
Quantum-dot cellular automata; Ternary processing; Wire crossing; Multi-layer design; 85.35.Be; MCS: 68Q80; 03B50