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Theory and Practice of“Striping”for Improved ON/OFF Ratio in Carbon Nanonet Thin Film Transistors

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Nano Research 2009年第2期2卷 167-175页

作者： Ninad Pimparkar Qing Cao John A.Rogers Muhammad A.Alam School of Electrical and Computer engineering Purdue UniversityWest LafayetteIndiana 47907-1285USA department of Chemistry Materials and Science engineering Electrical and Computer engineering Beckman Institute Frederick and Seitz Materials Res.lab University of IllinoisUrbanaIL 61801USA

A new technique to reduce the influence of metallic carbon nanotubes(CNTs)relevant for large-scale integrated circuits based on CNT-nanonet transistorsis proposed and ***,electrical and chemical filtering of the metallic CNTs have been used to improve the ON/OFF ratio of CNT-nanonet transistors;however,the corresponding degradation in ON-current has made these techniques somewhat ***,we abandon the classical approaches in favor of a new approach based on relocation of asymmetric percolation threshold of CNT-nanonet transistors by a technique called“striping”;this allows fabrication of transistors with ON/OFF ratio>1000 and ON-current degradation no more than a factor of *** offer first principle numerical models,experimental confirmation,and renormalization arguments to provide a broad theoretical and experimental foundation of the proposed method.

关键词： Nanonet Carbon nanotube flexible electronics thin film transistors

Random Networks and Aligned Arrays of Single-Walled Carbon Nanotubes for Electronic Device Applications

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Nano Research 2008年第4期1卷 259-272页

作者： Qing Cao John A.Rogers department of Chemistry University of Illinois at Urbana-ChampaignUrbanaIllinois 61801USA department of Materials Science and engineering University of Illinois at Urbana-ChampaignUrbanaIllinois 61801USA department of Electrical and Computer engineering University of Illinois at Urbana-ChampaignUrbanaIllinois 61801USA department of Mechanical Science and engineering University of Illinois at Urbana-ChampaignUrbanaIllinois 61801USA Frederick-Seitz Materials Research lab.ratory University of Illinois at Urbana-ChampaignUrbanaIllinois 61801USA Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-ChampaignUrbanaIllinois 61801USA

Singled-walled carbon nanotubes(SWNTs),in the form of ultrathin fi lms of random networks,aligned arrays,or anything in between,provide an unusual type of electronic material that can be integrated into circuits in a conventional,scalab.e *** electrical,mechanical,and optical properties of such fi lms can,in certain cases,approach the remarkable characteristics of the individual SWNTs,thereby making them attractive for applications in electronics,sensors,and other *** review discusses the synthesis and assembly of SWNTs into thin film architectures of various types and provides examples of their use in digital electronic circuits with levels of integration approaching 100 transistors and in analog radio frequency(RF)systems with operating frequencies up to several gigahertz,including transistor radios in which SWNT transistors provide all of the active *** results represent important steps in the development of an SWNT-based electronics technology that could fi nd utility in areas such as fl exible electronics,RF analog devices and others that might complement the capabilities of established systems.

关键词： Carbon nanotubes electronic devices thin-film transistors

dsps/FPGAs Comparative Study for Power Consumption, Noise Cancellation, and Real Time High Speed Applications

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Journal of Software engineering and Applications 2010年第4期3卷 391-403页

作者： Alon Hayim Michael Knieser Maher Rizkalla department of Electrical and Computer engineering Indiana University Purdue University Indianapolis Indianapolis USA.

Adaptive noise data filtering in real-time requires dedicated hardware to meet demanding time requirements. Both dsp processors and FPGAs were studied with respect to their performance in power consumption, hardware architecture, and speed for real time applications. For testing purposes, real time adaptive noise filters have been implemented and simulated on two different platforms, motorola dsp56303 EVM and Xilinx Spartan III boards. This study has shown that in high speed applications, FPGAs are advantageous over dsps with respect of their speed and noise reduction because of their parallel architecture. FPGAs can handle more processes at the same time when compared to dsps, while the later can only handle a limited number of parallel instructions at a time. The speed in both processors impacts the noise reduction in real time. As the dsp core gets slower, the noise removal in real time gets harder to achieve. With respect to power, dsps are advantageous over FPGAs. FPGAs have reconfigurable gate structure which consumes more power. In case of dsps, the hardware has been already configured, which requires less power consumption? FPGAs are built for general purposes, and their silicon area in the core is bigger than that of dsps. This is another factor that affects power consumption. As a result, in high frequency applications, FPGAs are advantageous as compared to dsps. In low frequency applications, dsps and FPGAs both satisfy the requirements for noise cancelling. For low frequency applications, dsps are advantageous in their power consumption and applications for the battery power devices. Software utilizing Matlab. VHDL code run on Xilinix system, and assembly running on motorola development systems, have been used for the demonstration of this study.

关键词： Four Quadrant (4Q) Converter Interlacing Traction Systems Power Quality Analysis

The integrated monitoring system for running parameters of key mining equipment based on condition monitoring technology

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Journal of Coal Science & engineering(China) 2010年第1期16卷 108-112页

作者： BIN Guang-fu LI Xue-jun BALBIR S Dhillon HUANG Zhen-yu GUO Deng-ta Key lab.of Health Maintenance for Mechanical Equipment of Hunan Province Hunan University of Science and Technology Xiangtan 411201 China department of Mechanical Eng. Univ/Ottawa Ottawa K1B 6N5 Canada Xiangtan Liangchuan Coal Mine Machine Co. Ltd. Xiangtan 411104 China Xiangtan Electric Manufacturing Corporation Ltd. Xiangtan 411101 China

An integrated monitoring system for running parameters of key mining equipmenton the basis of condition monitoring technology and modern communication networktechnology was *** system consists of a client computer with functions ofsignal acquisition and processing, and a host computer in the central control *** acquisition module of the client computer can collect the running parameters fromvarious monitoring terminals in *** dsp high-speed data processing system ofthe main control module can quickly achieve the numerical calculation for the *** signal modulation and signal demodulation are completed by the frequencyshift keying circuit and phase-locked loop frequency circuit, ***, the signalis sent to the host computer for logic estimation and diagnostic analysis using the networkcommunication technology, which is helpful for technicians and managers to control therunning state of equipment.

关键词： mining key equipment running parameters condition monitoring signal acquisition and processing integrated monitoring