A voterless strategy for defect-tolerant nano-architectures

Redundancy techniques, such as N-tuple modular redundancy, has been widely used to correct faulty behavior of components and achieve high reliability. However, the NMR systems, and many other redundancy-based strategies, are all based on majority voting. The voter, therefore, becomes a critical block for the correct operation of any NMR system. In this paper, we propose a voterless defect-tolerant strategy to implement a robust NMR system design. We show that using a novel communication mechanism, namely logic code division multiple access, and inexpensive transceivers, we can transfer data with extremely low error rates among N modules and completely eliminate the need for the voter block. Such a highly reliable strategy is vital for future nano systems in which high defect rate is expected. Experimental results are also reported to verify the concept, clarify the design procedure and measure the systempsilas reliability.