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Nano size carbon, such as carbon nanotubes (CNTs) and graphene has remarkable electronic properties for high-frequency electronics in terms of designing VLSI circuits. CNTFETs are the best candidates for nano electronics as well as upcoming digital devices in near future. An intensive review is presented in this paper. The structure, materials, application and the characteristics of CNTFETs are analyzed...
Carbon nanotube field-effect transistor (CNTFET) is a nano scale electronics device that has excellent electrical proper to perform fast operation. In this research, a 14nm CNTFET model has been proposed to operate in high frequency performance. The CNTFET model is developed by quantum capacitance and electrostatic capacitance to enhance the mode of nanotube transistor. It can be used for design of...
Modeling of high frequency carbon nanotube field-effect transistor (CNTFET) is analyzed in this paper to develop logic gate. The aim of this research is to minimize the dimension of the logic gate for the future electronic device application. The analytical models of CNTFETs are employed to model the logic gates and verify their transfer characteristics. The logic gates discussed in this paper are...
Conventional CMOS technology provides a lot of opportunities in the field of electronics device. But presently, carbon nanotube field effect transistor (CNTFET) is a new technology for the application in the field of electronic device. Due to the limitation of the size of CMOS, CNTFETs are the promising substitute due to its nano scale size. CNTFET also shows the high stability, low power circuit...
A transport phenomenon of carbon nanotube field effect transistor (CNTFET) is proposed in this paper. Non-Equilibrium Green's Function (NEGF) is used to design the proposed model. CNT chiral vector is straightly connected with CNTFET transport properties by this method. The ballistic CNTFET is realized by the carrier transport in the conduction and valence band. This phenomenon of CNT introduces a...
In this paper, we elucidate the development of SPICE model of Carbon Nanotube Field Effect Transistor (CNTFET) and analyze the performance of the proposed model. A set of key parameter can be obtained from this model analysis such as drain current variation as a function of the conductance and drain-source voltage. Furthermore, a SPICE small signal model nanotube transistor is developed. It is used...
In this paper, the design of SPICE circuit model has been discussed for Carbon Nanotube Field Effect Transistor (CNTFET) and predict device high frequency performance. An enhancement mode SPICE circuit model for nanotube transistor has been developed. A new CNTFET circuit can be developed by using this SPICE model. It can be also used to examine the performance benefits of the newly built transistor...
In this paper, we describe the development of small signal model of a CNTFET. The development consist of high frequency response of CNTFET. The CNTFET generates higher output rather than the conventional Si MOSFET. An SPICE model for enhancement mode Carbon nanotube transistor has been developed. The performance analysis of the CNTFET shows the desirable performance parameter in terms of 10 Thz frequency...
The geometrical structure of carbon nanotubes has been calculated and analyzed in this paper. The analysis of carbon nanotube for Pz orbital, perpendicular to the graphene sheet and thus the nanotube surface forms a delocalized π network across the nanotube, which is responsible for its electronic properties. These electronic properties are obtained from tight binding (TB) model for graphene. Furthermore,...
This paper suggests the modeling phenomena of small band-gap Carbon Nanotube (CNT). Device physics of CNT is studied and do the calculation of sub-band for zigzag CNT to model small band-gap tubes. Each carbon nanotube is described as a graphene sheet rolled into a cylindrical shape so that the structure is one dimensional with axial symmetry. A comparison is made with the current literature to show...
In this paper, graphene electronic structure of carbon nanotubes has been analyzed and validate with past theoretical and experimental results. The energy dispersion relation, effective mass and intrinsic carrier concentration of graphene have been analyzed to build diverse carbon nanotubes. The electronics properties of graphene are subject to change with the different diameters and wrapping angles...
A multi-valued logic outputs for analog to digital (ADC) have been implemented in this paper. The use of multiple-valued logic outputs for ADC design offers the possibility of an overall reduction in circuit complexity and size. The ADC generates multi-valued logic outputs rather than the conventional binary output system. The design implements current mode ADC architecture and is simulated using...
A low-power quaternary comparator circuit using current-mode CMOS multiple-valued logic (MVL) circuits has been presented in this paper. Existing MVL comparator circuits consume high power. The circuit presented in this paper has been shown low power digital output. It has been simulated with PSPICE using the transistor model parameter values of the BSIM3 NMOS model V3.2 for 0.13 μm CMOS process....
A 2-bit higher radix analog-to-digital converter (ADC) circuit consisting of a combination of a pipelined ADC(and a set of cascaded current comparator cell has been proposed. The ADC generates multi-valued logic outputs rather than the conventional binary output system. The design is implemented using 0.13|im CMOS process. The performance analysis of the design shows desirable performance parameters...
Robots are playing an increasingly more important role as the technology is maturing. Robots are omnipresent; numerous robots committed to a single task will become ordinary. Multi-agent robots are capable of handling problems in many different ways than individuals while achieving higher levels of performance. But present unique challenges for developing collaborative navigation algorithm and coordination...
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