Abstract
A multiple-valued current-mode MOS integrated circuit is proposed for high-speed arithmetic systems at low supply voltage. Since a multiple-valued source-coupled logic circuit with dual-rail complementary inputs results in a small signal-voltage swing while providing a constant driving current, the switching speed of the circuit is improved at low supply voltage. As an application to arithmetic systems, a high-speed parallel multiplier using a Booth-encoded algorithm and redundant code (which is realized by using multiple-valued MOS current-mode circuits) is designed. The performance of the proposed circuits is evaluated to be faster than that of a corresponding binary implementation under normal power dissipation. A prototype chip is fabricated to confirm the basic operation of the multiple-valued arithmetic circuit.
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