Title :
Performance comparison of quantum-dot cellular automata adders
Author :
Zhang, Rumi ; Walus, Konrad ; Wang, Wei ; Jullien, Graham A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, Ont., Canada
Abstract :
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.
Keywords :
adders; carry logic; cellular automata; logic design; quantum interference devices; semiconductor quantum dots; QCA adders; QCA bit-serial adder design; QCA computational units; QCA ripple-carry adder; carry-look-ahead adder; carry-select adder; circuit latency; clocking zones; performance comparison; quantum-dot cellular automata adders; Adders; CMOS technology; Circuits; Clocks; Delay; Electrons; Laboratories; Polarization; Quantum cellular automata; Quantum dots;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465139
