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An Improved Power Consumption Circuit of a 5.7 GHz Variable-Gain Low Noise Amplifier (VGLNA) for RF Applications

An Improved Power Consumption Circuit of a 5.7 GHz Variable-...

引用

International RF and Microwave Conference, RFM

作者： L. Lee S. S. Jamuar R. Mohd Sidek S. Khatun Department of Electrical and Electronics Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Computer and Communication System Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia

A low voltage topology that uses a capacitively coupled resonating element has been introduced using 0.18 mum CMOS technology. The topology utilizes the decoupling scheme to dc isolate circuit elements that are connected in series and share a common dc current. A 5.7 GHz variable-gain low noise amplifier (VGLNA) is presented with simulation results exhibiting a noise figure of 1.02 dB, power gain of 19.41 dB with gain tuning range of 6 dB and IIP3 of -1.11 dBm. The power consumption reported is 12.88 mW at supply of V dd = 0.7 V for power optimization circuit. Simulation results show that the proposed VGLNA has better noise performance and improved power consumption compared to the conventional cascode VGLNA

关键词： Energy consumption Circuit noise Low-noise amplifiers Radiofrequency amplifiers Radio frequency Circuit topology CMOS technology Noise figure Circuit simulation Gain

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User's Request Responsible Data Broadcasting Service for T-DMB/CDMA Converged Environment

User's Request Responsible Data Broadcasting Service for T-D...

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IEEE Conference on Vehicular Technology (VTC)

作者： Byungjun Bae Chunghyun Ahn Hyocheol Jang Jongdeok Kim Broadcasting System Research Group Electronics and Telecommunication Research Institute Daejeon South Korea Department of Computer Science & Engineering Pusan National University busan South Korea

This paper presents an interactive data broadcast algorithm for T-DMB/CDMA converged environment. The proposed algorithm improves responsiveness to user requests and resource efficiency by adapting to the various chan... 详细信息

关键词： Multiaccess communication Digital audio broadcasting Multimedia communication Delay Digital video broadcasting Digital multimedia broadcasting Costs Wireless networks Network servers Multimedia systems

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Design and Implementation of Linux-based Application which supports CDMA and WiBro network

Design and Implementation of Linux-based Application which s...

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International Conference on Advanced Communication Technology (ICACT)

作者： Dohyung Kim Minhong Yun Sunja Kim Cheol-Hoon Lee Embedded S/W Research Division Electronics and Telecommnications Research Institute South Korea Department of Computer Engineering System Software Laboratory Chungnam National University South Korea

This paper describes the design and implementations of the first application service based on embedded Linux; Mobile Teller which uses WiBro network for data communications and CDMA network for voice communications. When a sender on a dual-mode terminal types texts, the texts are transmitted to a TTS server located in the Internet through WiBro network. Subsequently, the TTS server changes the texts into voices and transmits the voice data to the dual-mode terminal. At last the dual-mode terminal sends the voice to the receiver through the CDMA network. In case of noisy environment, Mobile Teller makes user to voice communication

关键词： Multiaccess communication Speech synthesis Mobile communication Application software Network servers Web pages Libraries Linux Web server Engines

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Strong Conflict Analysis for Propositional Satisfiability 06

Strong Conflict Analysis for Propositional Satisfiability

引用

Design, Automation and Test in Europe Conference and Exhibition

作者： HoonSang Jin F. Somenzi CAE center System LSI division Semicon. Business Samsung Electronics Company Limited South Korea Department of Electrical and Computer Engineering University of Colorado Boulder USA

ISBN: (纸本)9783981080100

We present a new approach to conflict analysis for propositional satisfiability solvers based on the DPLL procedure and clause recording. When conditions warrant it, we generate a supplemental clause from a conflict. This clause does not contain a unique implication point, and therefore cannot replace the standard conflict clause. However, it is very effective at reducing excessive depth in the implication graphs and at preventing repeated conflicts on the same clause. Experimental results show consistent improvements over state-of-the-art solvers and confirm our analysis of why the new technique works

关键词： computer aided engineering Large scale integration computer science Stochastic processes Electronic design automation and methodology Contracts Business continuity Algorithm design and analysis

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Symbol Error Probability for Space-Time Block Codes Over Spatially Correlated Rayleigh Fading Channels

Symbol Error Probability for Space-Time Block Codes Over Spa...

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IEEE Conference on Vehicular Technology (VTC)

作者： Juphil Cho Kyung Seung Ahn Heung Ki Baik Young-il Kim Jee-hwan Ahn School of Electronics and Information Engineering Kunsan National University Gunsan South Korea Wireless System Research Group Electronics and Telecommunications Research Institute Daejeon South Korea Department of Electrical and Computer Engineering University of Texas Austin Austin TX USA Division of Electronics and Information Engineering Chonbuk National University of Korea Jeonju South Korea

In general, multi-input multi-output (MIMO) channel is correlated by an amount that depends on the propagation environment as well as the polarization of the antenna elements and the spacing between them. In this paper, an exact error probability of orthogonal space-time block codes is considered in spatially correlated Rayleigh fading channels. We derive a general formula for the symbol error probability (SEP) of orthogonal space-time block codes for general PSK/PAM/QAM over spatially correlated Rayleigh fading channels.

关键词： Error probability Block codes Fading Receiving antennas MIMO Bit error rate Transmitting antennas Polarization Antennas and propagation Error analysis

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Design and Evaluation of a PLL-Based Position Controller for Sensorless Vector Control of Permanent-Magnet Synchronous Machines

Design and Evaluation of a PLL-Based Position Controller for...

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Annual Conference of Industrial electronics Society

作者： Rolando P. Burgos Parag Kshirsagar Alessandro Lidozzi Jihoon Jang Fred Wang Dushan Boroyevich Pedro Rodriguez Seung-Ki Sul Virginia Tech Center for Power Electronics Systems Blacksburg VA USA Department of Mechanical and Industrial Engineering ROMA TRE University Rome Italy HEV System Engineering Team Hyundai Motor Company South Korea Department of Electrical Engineering Technical University of Catalonia Barcelona Spain School of Electrical Engineering Computer Science Seoul National University Seoul South Korea

This paper presents a rotor position controller for sensorless vector control of permanent magnet synchronous machines (PMSM) based on a synchronous d-q frame phase-locked loop (PLL). Extending the capabilities of PLL's for grid-connected converters-using feedback linearization to ensure a constant dynamic response regardless of the operating region and rotor speed, the proposed controller takes advantage of the sinusoidal and balanced PMSM back-EMF voltages synchronizing the estimated and actual d-q frames. The resultant controller structure is readily linearized providing an accurate design tool based on frequency response specifications. A complete design procedure is provided, together with simulation and experimental results with a 3.5 kW PMSM drive, all of which verify the excellent results attained by the proposed PLL-based position controller.

关键词： Sensorless control Machine vector control Synchronous machines Rotors State estimation Observers Control systems Permanent magnet machines Phase locked loops Feedback

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High Temperature Stable [Ir3Si-TaN]/HfLaON CMOS with Large Work-Function Difference

High Temperature Stable [Ir3Si-TaN]/HfLaON CMOS with Large W...

引用

International Electron Devices Meeting (IEDM)

作者： C. H. Wu B. F. Hung Albert Chin S. J. Wang W. J. Chen X. P. Wang M.-F. Li C. Zhu Y. Jin H. J. Tao S. C. Chen M. S. Liang Institute of Microelectronics Department of Electronics Engineering National Cheng Kung University Tainan Taiwan Nano-Science Technology Ctr Department of EE. Nat'l Chiao-Tung U. U. System of Taiwan Hsinchu Taiwan Graduate Institute of Materials Engineering National Pingtung University of Science and Technology Taiwan SNDL Department of Electrical & Computer Engineering National University of Singapore Singapore Taiwan Semiconductor Manufacturing Corporation Hsinchu Taiwan

The authors report novel 1000degC-stable [Ir 3 Si-TaN]/HfLaON CMOS for the first time, where the self-aligned and gate-first process are full compatible to current VLSI. Good Phi m-eff of 5.08 and 4.24 eV, low V t of -0.10 and 0.18 V, high mobility of 84 and 217 cm 2 /Vs at 1.6 nm EOT, and small 85degC BTI <20 mV (10 MV/cm for 1 hr) are measured

关键词： Temperature Hafnium compounds Crystallization Dielectrics CMOS technology Leakage current Thermal stability Amorphous materials computer aided manufacturing Very large scale integration

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Intrinsic Speed-Sensorless Control of Induction Motor

Intrinsic Speed-Sensorless Control of Induction Motor

引用

IEEE Conference on Decision and Control

作者： Marcello Montanari Sergei Peresada Andrea Tilli Center for Research on Complex Automated Systems E2809CG. EvangelistiE2809D (CASY) Department of Electronics Computer and System Sciences (DEIS) University of Bologna Bologna Italy Department of Electrical Engineering Ukraine E2809CKiev Polytechnic InstituteE2809D National Technical University Kiev Ukraine

ISBN: (纸本)1424401704

A novel speed sensorless control technique for induction motors is presented. No "simplifying" assumption on the magnetic flux (such as known initial conditions, measurable rotor/stator fluxes) is considered and the load torque is assumed constant, but unknown, according to the usual industrial control problem. In the proposed solution, the natural stabilizing feedback between torque current and the mechanical dynamics is suitably "modulated" using adaptive control techniques. Main feature and novelty of the presented approach is that no explicit speed estimation is utilized to compensate for the load torque (in this sense, the solution is "intrinsic"). Local exponential stability of the resulting nonlinear time-varying tracking error dynamics is guaranteed, if a physically meaningful persistency of excitation condition is satisfied. Simulations results under significant operating conditions are provided

关键词： Induction motors Sensorless control Magnetic flux Torque measurement Rotors Stators Industrial control Feedback Adaptive control Stability

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A Study on Hybrid Energy Storage system for 42V Automotive Power-net

A Study on Hybrid Energy Storage System for 42V Automotive P...

引用

IEEE Conference on Vehicle Power and Propulsion (VPPC)

作者： Baek-Haeng Lee Dong-Hyun Shin Byeong-Woo Kim Hee-Jun Kim Byoung-Kuk Lee Chung-Yuen Won Jin Hur Electronics System R&D Center Korea Automotive Technology Institute Chonan ChungNam South Korea Department of Computer Science & Engineering Hanyang University Chonan ChungNam South Korea School of Information and Communication Engineering Sungkyunkwan University Chonan ChungNam South Korea Intelligent Mechatronics Research Center Korea Electronic Technology Institute Chonan ChungNam South Korea

There are lots of attempts in automotive field to supersede mechanical parts with electrical ones owing to increasing needs of drivers' safety, comfort and convenience as well as recent tightened environmental regulation. In addition, continuous improvements of semiconductor technology make it speed up to use electric components instead of conventional mechanical and hydraulic ones. In accordance with these tendencies, the demand of electric power and energy used in vehicle has been increasing steadily, and it will cause overburden of conventional 14 V power generation and distribution system. A research on higher voltage system started in early 1990s and 42 V power system has been introduced for a future automotive power-net. In this paper, technical trend in energy storage system which implies one of the key technologies to implement 42 V power-net is reviewed, and development results of the improved energy storage system consisted of ultracapacitor, battery and management controllers are presented

关键词： Energy storage Automotive engineering Electrical safety Continuous improvement Vehicles Power generation Voltage Power systems Supercapacitors Batteries

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Italian-Croatian Remote Laboratory Distributed on Geographical Network

Italian-Croatian Remote Laboratory Distributed on Geographic...

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International Conference on Software, Telecommunications and computer Networks (SoftCOM)

作者： Mladen Borsic Drago Cmuk Pasquale Daponte Claudio De Capua Domenico Grimaldi Tomislav Kilic Tarik Mutapcic Maria Riccio Faculty of Electrical Engineering and Computing Zagreb Croatia Department of Engineering University of Sannio Benevento Italy Dipartimento Informatica Matematica Elettronica e Trasporti University E2809CMediterraneaE2809D Reggio Calabria Italy Department of Electronics Computer and System Science University of Calabria Rende Cosenza Italy Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture University of Split FESB Split Croatia Tarmel d. o. o Zagreb Croatia Didagroup S.p.A. San Giorgio del Sannio Italy

The paper presents the e-learning project and the work until now developed for extending the features of the Italian remote laboratory "G. Savastano" to the academic circles of East Europe, Western Balkan and Mediterranean area. In particular, in the framework of the project "Italian-Croatian remote laboratory distributed on geographic network", the Italian-Croatian collaboration is highlighted. The proposed approach follows EU efforts to implement internal lifelong learning program and influence educational systems of EU partners and neighbor Countries while helping them to overcome problems with their own educational systems and lack of resources. Developed experiments, included in the remote laboratory, give the possibility of achieving practical experience on several fields, while multilingual approach gives the access to such facility to the students coming from different countries. Moreover, the idea of interactively controlled transfer of knowledge and experience offers new opportunities to the remote experiments enabling them to be executed without supervising necessity

关键词： Remote laboratories Educational programs Education Europe Internet Electronic learning Vocational training Instruments Collaborative software computer networks

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