Quantum dot Cellular Automata (QCA) is a novel and potentially attractive
technology for implementing computing architectures at the nanoscale. The basic
Boolean primitive in QCA is the majority gate. In this paper we present a novel
design for QCA cells and another possible and unconventional scheme for
majority gates. By applying these items, the hardware requirements for a QCA
design can be reduced and circuits can be simpler in level and gate counts. As
an example, a 1-bit QCA adder is constructed by applying our new scheme and is
compared to the other existing implementation. Beside, some Boolean functions
are expressed as examples and it has been shown, how our reduction method by
using new proposed item, decreases gate counts and levels in comparison to the
other previous methods.Comment: arXiv admin note: text overlap with arXiv:cond-mat/010440
This paper proposes a new algorithm to simplify the multiple valued logic (MVL) decision diagrams. This algorithm is based on a new level coupling rule. By changing the designer's perspective towards the design, this rule can make further simplification possible. In most of state of the art designs, the decision diagram plays a serious role in the implementation of the logical functions. The proposed algorithm uses the new level coupling rule and combines it with the existing ones, presenting a new method in simplifying and implementing the basic decision diagram.
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