Low Power Quaternary CMOS Circuit Design

In this paper voltage mode quaternary circuits are introduced. The quaternary circuits are encoder and decoder circuit, half and full adder circuit. Quaternary operators and elements which are used in the implementation of encoder and decoder circuits, half and full adder are also presented. The set of operators are logical sum, logical product, level up, level down, level conversion operator. Quaternary element is inverter based unit which is also presented. These circuits use two kinds of transistors that is enhancement- mode and depletion-mode transistors. Proposed circuits are static and operate in voltage mode. There is no static dissipation. All these circuits are VLSI implementable and do not use clocking. Simulation results of the introduced quaternary voltage-mode circuit, using SPICE level 3, 1.5 um technology shows higher speed and better performance than existing one.