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Comments on 'Can Redundancy and Masking Improve the Performance of Synchronizers?'
May 1989 (vol. 38 no. 5)
pp. 750-753
It is claimed in the above-mentioned work that redundancy and masking techniques are ineffective in improving synchronizer performance due to metastable behavior. This claim is based on an input model that is not always valid, particularly in reliability analysis. The commenter points out the weakness in the assumed model and provides an alternative input model which can be used to analyze redu

[1] G. R. Couranz and D. F. Wann, "Theoretical and experimental behavior of synchronizers operating in the metastable state,"IEEE Trans. Comput., vol. C-24, pp. 604-616, June 1975.
[2] J. H. Hohl, W. R. Larsen, and L. C. Schooley, "Prediction of error probabilities for integrated digital synchronizers,"IEEE J. Solid State Circuits, vol. SC-19, pp. 236-244, Apr. 1984.
[3] M. Hurtado, "Structure and performance of asymptotically bistable dynamic systems," D.Sc. dissertation, Washington Univ., St. Louis, MO, 1974.
[4] W. Fleishhammer and O. Dortok, "The anomalous behavior of flip-flops in synchronizer circuits,"IEEE Trans. Comput., vol. C-28, pp. 273-279, Mar. 1979.

Index Terms:
redundancy; masking; synchronizer performance; metastable behavior; reliability analysis; input model; redundant synchronizer reliability; deterministic model; performance evaluation; redundancy; reliability theory.
A. El-Amawy, "Comments on 'Can Redundancy and Masking Improve the Performance of Synchronizers?'," IEEE Transactions on Computers, vol. 38, no. 5, pp. 750-753, May 1989, doi:10.1109/12.24278
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