Title :
Fault Tolerant Schemes for QCA Systems
Author :
Ma, Xiaojun ; Lombardi, Fabrizio
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA
Abstract :
Quantum-dot Cellular Automata (QCA) is a promising nanotechnology that offers significant improvements over CMOS. QCA is limited by the high fault rate in manufacturing. New fault tolerant schemes are required to reliably assemble a system with fault-prone QCA technology. This paper analyzes and compares several fault tolerant schemes for QCA systems. It is shown that majority multiplexing (Maj-MUX) is a high capacity fault tolerant scheme specially suitable for QCA. The fault tolerant capability of QCA using Maj-MUX is investigated in detail in this work. The signal restoration speed of the Maj-MUX scheme is reported. Compared with NAND-multiplexing, the Maj-MUX can tolerate a higher fault rate and restore signals at a lower overhead.
Keywords :
cellular automata; fault simulation; logic testing; quantum dots; CMOS; NAND-multiplexing; fault tolerant schemes; majority multiplexing; nanotechnology; quantum-dot cellular automata; Circuit faults; Clocks; Fault tolerance; Fault tolerant systems; Logic devices; Quantum cellular automata; Quantum dots; Signal restoration; Switches; Very large scale integration; Fault tolerance; QCA; reliable computing;
Conference_Titel :
Defect and Fault Tolerance of VLSI Systems, 2008. DFTVS '08. IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
978-0-7695-3365-0
DOI :
10.1109/DFT.2008.12
