Quantum-dot Cellular Automata (QCA) is an
emerging technology and one of the suitable alternatives
to conventional CMOS technology. Designing efficient
basic logic circuits like decoders is an open research topic
in this emerging technology. As reliability is also the most
important issue in QCA technology circuit design due to
its susceptibility to faults occurring during chemical
fabrication, we design an efficient coplanar robust 2-to-4
decoder, employing a novel fault-tolerant three-input
majority gate. Our proposed majority gate is designed
with 11 simple QCA cells. The area and energy
consumptions of the proposed majority gate is 0.01 μm2
and 1.49×2-2 MeV, respectively. The presented majority
gate has also 71% and 100% tolerance against single-cell
omission and extra-cell deposition defects, respectively,
and it has a proper tolerance against cell displacement and
misalignment defects. The novel robust 2-to-4 decoder is
also designed using the proposed majority gate. The
simulation results show that the presented decoder is more
efficient in comparison to previous designs. Manuscript profile