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.
Advanced devices and emittercoupled circuit techniques are explored for implementing ultra hgh speed computer arithmetic. Redundant encoding of the input daits and multiple-valued operands are used in the positive-digit and signed-digit number systems. Addition in both systems has only three steps and entails no carry propagation chains. Emittercoupled MVL is presented including a novel literal circuit. SPICE simulations of AIGaA&aAs HBT integrated circuits resulted in 1.4 -1.6 GHz clock performance estimates of the ECMVL building blocks. Advanced InP-based HBT technology development is proposed to attain 4 -10 GHz adder and multiplier performance. Modified circuits using resonant tunneling diodes and transistors are also discussed.
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