Journal of Computational Electronics

, Volume 8, Issue 1, pp 35–42

Architecture for an external input into a molecular QCA circuit


DOI: 10.1007/s10825-009-0268-0

Cite this article as:
Walus, K., Karim, F. & Ivanov, A. J Comput Electron (2009) 8: 35. doi:10.1007/s10825-009-0268-0


A simple architecture for data input into a molecular quantum-dot cellular automata (QCA) circuit from an external CMOS circuit is proposed. A “T”-shaped interconnect, utilizing fixed-polarization cells to provide the desired polarization, is controlled via external electrodes connected to a standard CMOS input driver. The applied input signal is used to gate either the propagation of a fixed polarization, P=+1, or that of the complementary fixed polarization, P=−1, into the QCA circuit. The architecture utilizes the field-driven clocking scheme proposed in recent literature to achieve transduction between applied input voltage and a molecular configuration. The system is modelled using the coherence vector formalism with a three-state basis and simulated using the QCADesigner simulation tool.


Quantum dot cellular automata QCA I/O Molecular computing 

Copyright information

© Springer Science+Business Media LLC 2009

Authors and Affiliations

  1. 1.Department of Electrical and Computer EngineeringUniversity of British ColumbiaVancouverCanada

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