Current-mode CMOS circuits are receiving increasing attention. Current-mode CMOS multiple-valued logic circuits are interesting and may have applications in digital signal processing and computing. In this paper we review several of the current-mode CMOS multiple-valued logic (MVL) circuits that we have studied over the past decade. These circuits include a simple current threshold comparator, current-mode MVL encoders and decoders, current-mode quaternary threshold logic full adders (QFAs), current-mode MVL latches, current-mode latched QFA circuits, and current-mode analog-to-quaternary converter circuits. Each of these circuits is presented and its performance described.>
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K.W. Current (1994) studied this question.
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