In emerging nanotechnologies, due to the manufacturing process, a significant percentage of components may be unreliable. In order to make systems based on unreliable components reliable, the design of fault tolerant architectures will be necessary. This paper presents a fault tolerant technique for future nanocomputers, namely, XOR/XNOR multiplexing. It is based on a massive duplication of imperfect devices and randomized imperfect interconnections. Dependent on the stage number, the system

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... function as XOR or XNOR. Bifurcation theory is used to analyze fault tolerant ability of the system and the results show that XOR/XNOR has a high fault tolerant ability. Similar to NAND multiplexing, this fault tolerant technique is potentially useful for future nanoelectronics.