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Word-voter: a new voter design for triple modular redundant systems

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2 Author(s)
S. Mitra ; Dept. of Electr. Eng., Stanford Univ., CA, USA ; E. J. McCluskey

Redundancy techniques are commonly used to design dependable systems to ensure high reliability, availability and data integrity. Triple Modular Redundancy (TMR) is a widely used redundancy technique that masks faults. In a TMR system, we have three implementations of the same logic function and their outputs are voted using a voter circuit. In this paper, we present a new voter design called the Word-Voter that has some distinct advantages over the bit-by-bit voting schemes used in conventional TMR systems. This paper demonstrates the usefulness of the word-voter design in increasing the data integrity (reducing the probability of corrupt outputs) of TMR systems. The area and delay overhead of the word-voter design is compared to that of the bit-by-bit voter. An efficient design of a TMR-Simplex system using the word-voter is also presented

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VLSI Test Symposium, 2000. Proceedings. 18th IEEE

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