Design of Digital Logic Circuits using Carbon Nanotube Field Effect Transistors
Subhajit Das1, Sandip Bhattacharya2, Debaprasad Das3 

1Subhajit Das, E.C.E. department, Bengal College of Engineering & Technology for Women, Durgapur, India.
2Sandip Bhattacharya, E.C.E. department, Bengal College of Engineering & Technology, Durgapur, India.
3Debaprasad Das, E.C.E. department, Meghnad Saha Institute of Technology, Kolkata, India.
Manuscript received on December 02, 2011. | Revised Manuscript received on December 14, 2011. | Manuscript published on January 05, 2012. | PP: 173-178 | Volume-1 Issue-6, January 2012. | Retrieval Number: F0292111611/2012©BEIESP
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Abstract: The work in this paper designs the basic logic circuits using the carbon nanotube field effect transistor (CNTFET). CNTFET is a novel device that is projected to outperform scaled CMOS technologies. CNTFET-based devices offer high mobility for near-ballistic transport, high carrier velocity for fast switching, as well as better electrostatic control due to the quasi one-dimensional structure of carbon nanotubes. CNTFET utilizes a semiconducting carbon nanotube (CNT) channel controlled by isolated electrostatic gates. It demonstrates p-type or n-type switching behavior depending upon the polarity-gate voltage. In this paper ambipolar CNTFETs are used to design basic logic circuits. The datapath logic blocks like half and full-adders are designed and their performances have been investigated.
Keywords: Carbon nanotube (CNT), CNT field-effect transistor (CNTFET), Transmission gate (TG), Verilog-AMS.