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<p><b>Abstract</b>—Kawahito et al present multiplier designs using the binary-tree reduction feature of certain highly redundant radix-2 representations, along with multiple-valued current-mode circuit techniques, and show them to compare favorably to those based on less redundant binary signed-digit and carry-save numbers. We point out that these representation schemes, and their potential advantages, have been discussed in earlier publications and that a more general view of the parallel-carries addition process exploited in these multipliers leads to other potentially useful representations.</p>
Binary signed-digit, carry-save, redundant number systems, stored-carry, stored-double-carry, stored-triple-carry, tree multipliers.

B. Parhami, "Comments on "High-Speed Area-Efficient Multiplier Design Using Multiple-Valued Current-Mode Circuits"," in IEEE Transactions on Computers, vol. 45, no. , pp. 637-639, 1996.
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