Performance Comparison of Quantum-dot Cellular Automata Adders
Rumi Zhang, Konrad Walus, Wei Wang, GRAHAM A. JULLIEN · 2005
QCA adders are fundamental building blocks of complex QCA computational units. In our analysis, we show that QCA ripple-carry adder and bit-serial adder designs actually outperform carry-look-ahead and carry-select adder designs. The QCA ripple-carry and bit-serial adders require fewer clocking zones, which have been found to be the main contributing factor toward overall circuit latency.