DESIGN OF TERNARY LOGIC ARITHMATIC CIRCUITS USING CARBON NANO-TUBE FIELD EFFECT TRANSITORS

Titiloye Stephen Oyediran&TitiloyeYetundeAdebimpe

Department of Electrical Engineering

 Federal Polytechnic, Bida

ABSTRACT

This paper presents a design of ternary arithmetic circuits including half-adder, full-adder and 1-bit comparator using Carbon Nano-Tube field effect transistors (CNTFET). The CNTFET has unique characteristics of behavior according to its arrangement of atoms. Threshold voltage of CNTFETs can vary by changing its diameter and also one intermediate state between two normal stable ON and OFF states introduced for multi-valued logic computation. Moreover ternary logic is a promising alternative to the conventional binary logic design technique, since it is possible to produce three states (TRUE, FALSE& UNKNOWN), and also reduces the number of interconnects and chip area and increases efficiency. Novel circuit design of half-adder and comparator based on ternary logic CNTFETs is proposed in this paper, where increased number of states in CNTFETs will eventually increase the number of bit handling capacity in the device.

Keywords:-Carbon Nano-Tube Field Effect Transistor (CNTFET), Multi Valued Logic (MVL), Half-Adder, Full-Adder,Comparator.