Three-tenninal quantum devices with novel characteristics have recently become available. The negative transconductance of the resonant tunneling transistor (RTT) is particularly useful for MVL. In this paper we examine the advantages of these devices for implementing very efficient MVL arithmetic building blocks. Full adders are described for both the PositiveDigit 2,4 redundant number system and the Signed-Digit 4,3 minimum-redundant number system. An outlook on nanoelectronic MVL is also given.

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