检索结果-内蒙古大学图书馆

IEEE Asia-Pacific Conference on ASIC (AP-ASIC)

作者： Po-Chiun Huang Yi-Huei Chen Chien-Chih Liu Chorng-Kuang Wang Department of Electrical Engineering College of Electrical Engineering and Computer Science National Taiwan University Taipei Taiwan Computer & Communication Laboratories Industrial Technology and Research Institute Hsinchu Taiwan

This paper presents a low-voltage low-power IF 455 kHz signal processor that contains a three-stage limiting amplifier and an FM/FSK demodulator. The limiting amplifier uses an on-chip feedforward offset cancellation circuit. The FM/FSK demodulator employs a quadrature detector that is composed of an on-chip phase detector and an external tank phase shifter. The demodulation constant is 20 mV/kHz with maximum /spl plusmn/10 kHz frequency deviation. The IF signal processor that consumes 2.3 mW from a single 2-V power supply demonstrates a high sensitivity of -72 dBm. It occupies an active area of 0.2 mm/sup 2/ using 0.6 /spl mu/m digital CMOS technology.

关键词： Frequency shift keying Demodulation Signal processing Circuits Frequency modulation Cutoff frequency CMOS technology Voltage Detectors Bandwidth

来源：评论

学校读者我要写书评

暂无评论

Vertical cavity lasers: device advances and new applications

Vertical cavity lasers: device advances and new applications

引用

Conference on Optoelectronic and Microelectronic Materials and Devices

作者： K.D. Choquette J.F. Klem M.J. Hafich A.A. Allerman K.M. Geib A.J. Fischer Department of Electrical and Computer Engineering University of Illinois Urbana USA Center for Compound Semiconductor Science and Technology Sandia National Laboratories Albuquerque USA

Central to the photonic revolution is the development of miniature light sources such as the vertical-cavity surface-emitting laser (VCSEL). VCSEL manufacturing has been established to provide inexpensive optical sources for data communication applications. Recent progress in materials and fabrication technologies has enabled a new generation of high performance VCSELs. We report recent device advances, including short (650 nm) and long (1300 nm) wavelength VCSELs, structures producing high single mode output, and hybrid integrated 2-dimensional transmitter arrays for spatial multiplexed optical interconnects.

关键词： Vertical cavity surface emitting lasers Surface emitting lasers Optical transmitters Optical arrays Light sources Optical surface waves Manufacturing Data communication Optical materials Optical device fabrication

来源：评论

学校读者我要写书评

暂无评论

Wireless optical transmissions with white colored LED for wireless home links

Wireless optical transmissions with white colored LED for wi...

引用

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Y. Tanaka S. Haruyama M. Nakagawa Department of Electrical Engineering Faculty of Science and Technology Keio University Yokohama Kanagawa Japan Advanced Telecommunication Laboratory Sony Computer Science Laboratories Inc. Shinagawa Tokyo Japan

We propose a wireless optical communication system with white colored LEDs for a wireless home link (WHL). The white colored LEDs have a high power output and are regarded as lamps for the next generation. In the proposed system, this device is used for a wireless home link. The proposed system is suitable for private networks such as consumer communication networks. From numerical and simulation results, it is confirmed that the proposed system is available and the problems to be solved are made clear.

关键词： Light emitting diodes Optical transmitters Optical fiber communication Radio transmitters High speed optical techniques Optical receivers Wireless communication Optical mixing laboratories Optical devices

来源：评论

学校读者我要写书评

暂无评论

Optical and electronic properties of GaNAs/GaAs structures

Optical and electronic properties of GaNAs/GaAs structures

引用

Conference on Optoelectronic and Microelectronic Materials and Devices

作者： I.A. Buyanova W.M. Chen G. Pozina P.N. Hai N.Q. Thinh E.M. Goldys H.P. Xin C.W. Tu Department of physics and measurement technology Linkoping University Linkoping Sweden Semiconductor science and technology laboratories Macquarie University Sydney NSW Australia Department of Electrical and Computer Engineering University of California La Jolla USA

ISBN: (纸本)0780366980

We review our recent results from studies of electronic properties of GaNAs/GaAs structures with low nitrogen content, by photoluminescence (PL), PL excitation, time-resolved PL spectroscopies as well as optically detected magnetic resonance (ODMR) and cyclotron resonance (ODCR) studies. The issues to be addressed include key material-related properties and fundamental electronic parameters of the GaNAs alloy, relevant to device applications, such as identification of the dominant recombination processes in the alloy, compositional dependence of the electron effective mass and band alignment in the GaNAs/GaAs heterostructures.

关键词： Gallium arsenide Magnetic resonance Magnetic properties Nitrogen Photoluminescence Spectroscopy Electron optics Optical detectors Cyclotrons Spontaneous emission

来源：评论

学校读者我要写书评

暂无评论

The planning and control of robot dextrous manipulation

The planning and control of robot dextrous manipulation

引用

IEEE International Conference on Robotics and Automation (ICRA)

作者： L. Han Z. Li J.C. Trinkle Z. Qin S. Jiang Department of Computer Science Texas A and M University College Station TX USA Department of Electrical and Electronic Engineering Hong Kong University of Science and Technology Kowloon Hong Kong China Intellligent Systems Principle Department Sandia National Laboratories Albuquerque NM USA

Dextrous manipulation is a fundamental problem in the study of multifingered robotic hands. Given a robotic hand and an object to be manipulated by the hand in an environment filled with obstacles, the main objectives of dextrous manipulation are to have the hand grasp the object and transfer it from a start configuration to a goal configuration without collision. To fulfill such a task in general, we will need: (a) a manipulation planner to generate a feasible path for the hand; and (b) a controller to implement the planned path. In this overview paper, we define the manipulation planning problem and present a unified control system architecture for multifingered manipulation (CoSAM/sup 2/). By incorporating the various kinematic and static relationships of a multifingered robotic hand system with proper sensory data inputs at different stages, CoSAM/sup 2/ achieves the various objectives of dextrous manipulation. Theoretical background of the control system design along with real-time experimental results are described.

关键词： Robot control Robot sensing systems Fingers Control systems Sensor systems Kinematics Actuators US department of Energy Contracts computer science

来源：评论

学校读者我要写书评

暂无评论

Low temperature solid-source molecular-beam epitaxy growth of Al-free quantum well laser diodes using a GaP-decomposition source

引用

Journal of Vacuum science and technology B: Microelectronics and Nanometer Structures 1999年第3期17卷 1281-1284页

作者： Postigo, P.A. Lullo, G. Choy, K.H. Fonstad, C.G. Department of Electrical Engineering and Computer Science Microsystems Technology Laboratory Massachusetts Institute of Technology Cambridge MA 02139 United States

Low threshold aluminum-free, InGaP/GaAs/InGaAs quantum well laser diodes have been grown at low temperature on GaAs using a GaP sublimation source for phosphorous and an atomic hydrogen cracker source for substrate surface preparation. The growth cycle was conducted entirely below 470°C so that it is compatible with growth on GaAs very large scale integrated circuits, as in the epitaxy-on-electronics monolithic optoelectronic integration processes. The room temperature pulsed threshold current density of broad-area stripe contact laser diodes was consistently on the order of 0.38 kA/cm². InGaP grown with the GaP cell is found by secondary ion mass spectroscopy to contain significant amounts of oxygen, particularly in Be- and Si-doped layers. © 1999 American Vacuum Society.

关键词：

来源：评论

学校读者我要写书评

暂无评论

An undergraduate microfabrication project laboratory case study: the micromechanical contactor array

An undergraduate microfabrication project laboratory case st...

引用

University/Government/Industry Microelectronics Symposium

作者： Chi Hoang M.A. Schmidt Department of Electrical Engineering and Computer Science MicroSystems Technology Laboratories Cambridge MA USA

Summary form only given. For approximately ten years, MIT has supported an undergraduate project laboratory which teaches microfabrication process design. The project laboratory attempts to engage the students in projects which have a end goal of fabrication of a specific novel device, often with an end user that is supporting the laboratory portion of the course. In this paper, we will present the most recent results of teaching this course in the Spring '98 semester. The project this semester was to fabricate an array of micromechanical contactors which could be used in the high-speed testing of integrated circuits. We will describe the execution of the course in detail. A detailed description of the final device design and fabrication will be given with the measured results. We will summarize the lessons learned, particularly in relation to organizing a team of students on one project, and the nuances of working with an industrial sponsor in a course environment.

关键词： laboratories Fabrication Circuit testing Process design Education Springs Micromechanical devices Contactors Integrated circuit testing High speed integrated circuits

来源：评论

学校读者我要写书评

暂无评论

Efficient techniques for accurate extraction and modeling of substrate coupling in mixed-signal IC's 99

Efficient techniques for accurate extraction and modeling of...

引用

Proceedings of the conference on Design, automation and test in Europe

作者： João Paulo Costa Mike Chou L. Miguel Silveira INESC/Cadence European Laboratories Department of Electrical and Computer Engineering Instituto Superior Técnico Lisboa Portugal Research Laboratory of Electronics Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA Cadence European Laboratories Department of Electrical and Computer Engineering Instituto Superior Técnico Lisboa Portugal

来源：评论

学校读者我要写书评

暂无评论

Efficient techniques for accurate extraction and modeling of substrate coupling in mixed-signal IC's

Efficient techniques for accurate extraction and modeling of...

引用

Design, Automation and Test in Europe Conference and Exhibition

作者： J.P. Costa M. Chou K.M. Silveira Department of Electrical and Computer Engineering Instituto Superior Técnico INESC/Cadence European Laboratories Lisboa Portugal Research Laboratory of Electronics Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA

Accurate modeling of noise coupling effects due to crosstalk via the substrate is an increasingly important concern for the design and verification of mixed analog-digital systems. In this paper we present a technique to accelerate the model computation using BEM methods that can be used for accurate and efficient extraction of substrate coupling parameters in mixed-signal designs.

关键词： Integrated circuit modeling Coupling circuits Crosstalk laboratories electrical capacitance tomography Acceleration Computational modeling Costs Wireless communication Circuit noise

来源：评论

学校读者我要写书评

暂无评论

100/spl times/100 optoelectronic cross-connect interconnects using OPTOBUS

引用

Journal of Lightwave technology 1999年第5期17卷 765-770页

作者： Jun Ai Yao Li Ting Wang Kai Shum Department of Computer Science and Engineering Guangdong University of Technology Guangzhou China NEC Research Institute Inc. Princeton NJ USA NEC C and C Research Laboratories Princeton NJ USA Department of Electrical Engineering The City College of New York and the Graduate School of the City University of New York New York NY USA

This paper demonstrates an OPTOBUS-based fully packaged optoelectronic cross-connect interconnect technique for data communication applications. Optical insertion loss of the compact 100/spl times/100 cross-connect interconnect device ranges from 0.4 to 2.9 dB among all possible connections. Optical transmissions with bit error rate (BER) of >10/sup -12/ can be maintained at per channel bandwidth of 900 Mb/s. The system is expected to have an aggregated interconnect bandwidth near 100 Gb/s when being fully connected with the OPTOBUS chips.

关键词： Optical interconnections Bandwidth Data communication Optical fiber communication Integrated circuit interconnections Optical fiber devices Packaging Optical arrays National electric code Optical fiber cables

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：