Journal of Computational Electronics

, Volume 8, Issue 1, pp 35–42 | Cite as

Architecture for an external input into a molecular QCA circuit



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 


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© Springer Science+Business Media LLC 2009

Authors and Affiliations

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

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