基于PCI Express总线的数据采集设备实现

PCI Express是最新的总线和接口标准,具有数据传输速率高,支持点对点传输以及热插拔等特点.首先,介绍PCI Express总线的发展与体系构架.然后结合采用Xilinx公司的FPGA与PHY器件设计采集设备的过程,详细介绍硬件系统的电路设计,以及采用Xilinx Pipe Core实现PCI Express物理层、链路层、传输层和使用winDriver开发简单的驱动程序.结合PCI Express总线设计的采集设备,整体性能可以显著提高,其必将取代以往各种总线的数据采集设备.     

PCI Express总线事务层IP核设计及实现

介绍了第三代输入输出总线PCI Express的事务层组成结构与功能,自顶向下对事务层进行了系统级设计,运用硬件描述语言Verilog HDL对其实现.使用Synopsys VCS进行功能仿真,得出了仿真波形,验证了该设计的正确性,符合PCI Express事务层协议.     

基于PCI Express总线的高速数据记录卡设计

提出了一种基于PCI Express总线的高速数据记录卡的设计方案.PCI Express是用来互连诸如计算机和通信平台应用中外围设备的第3代高性能I/O总线,它已开始取代PCI、PCI-X技术,成为最主要的高速互联技术.文中介绍运用Virtex-5器件内嵌的PCI Express端点模块实现总线接口,并详细阐述高速数据记录卡的结构组成和功能实现.工程实践表明,该高速数据记录卡的记录带宽能达到300 MB/s,可用于雷达系统高速回波数据的记录.     

基于CH368芯片的PCIE总线控制卡设计

基于CH368芯片设计了PCI Express总线接口电路,将串行传输模式转换为相对简易的并行传输模式.通过动态链接库编译和上位机软件设计,为使用CH368控制PCI Express总线提供了底层技术支持.控制卡有多通道输入及输出,可以满足数字信号、模拟信号的传输检测.     

基于PCI Express总线的数字电视传送流采集卡设计

本文提出了一种基于 PCI Express 总线的数字电视传送流采集卡设计方案。详细阐述采集卡的整体设计、硬件接口以及软件实现,重点介绍了如何发挥PCI Express总线高带宽的优势实现高速DMA数据传输。最后,利用Quartus II 13.0开发环境下的SignalTap II对自行开发的PCI-E 接口板进行了在线调试和传输验证,测试表明该采集卡能满足数字电视传送流采集系统的要求。     

基于Virtex5的PCI—Express总线接口设计

PCI Express技术已成为PC桌面电脑和图形设备的标准互联总线,占据着主要市场。它作为第三代I/O总线互联技术开始取代PCI,PCI-X技术,成为最主要的高速互联技术,其已应用在服务器、移动设备、工作站、网络设备、通信设备、工业控制设备、图形设备等领域。通过分析PCI Express协议原理和Virtex5 Lxt PCIE Endpoint block硬核模块结构功能,设计基于Virtex5 lx50t硬件板卡,实现了PCI Express的数据传输。     

基于PCI-Express的高速数据交换设计及应用

提出了利用PCIE总线技术实现数据高速传输的方案,结合共享内存、DMA等技术设计了基于PCI—Express总线的高速数据传输卡．实现了将采集的数据实时传送到PC的共享内存缓冲区,数据传输采用DMA方式。采用接口器件PEX8111实现PCI—Express总线到PCI总线的桥接。使用FPGA编写PCI总线的接口逻辑,最后进行测试。     

基于光纤环路和PCI Express的多轴数控系统设计

针对多轴数控系统的工作特点和发展趋势,提出了一种基于光纤环路和PCI Express的多轴数控系统平台的设计方法.首先给出了系统的基本结构;然后从PCI Express总线接口设计、光线主站设计和光纤从站设计三个方面讨论了系统的硬件设计方法;最后介绍了该系统在linux下驱动程序的设计方法.     

基于PCI Express总线的数字电视传送流发送/采集卡设计

提出了一种基于PCI Express总线的数字电视传送流发送/采集卡设计方案。详细阐述了板卡的整体设计、硬件接口以及软件实现,重点介绍了如何发挥PCI Express总线高带宽的优势实现高速DMA数据传输。最后,利用Quartus II 13.0开发环境下的Signal Tap II工具对自行开发的PCI-E接口板进行了在线调试,测试表明该设计能满足数字电视传送流传输系统的要求。     

新一代高速I／O连接而优化的PCIe发展脉动

PCI Express（PCIe）是PCI计算机总线的一种，但采用了串行通讯方式，因此能在现有PCI基础上，以仅修改实体层的方式，迅速实现更快的数据传输速率。具有高宽带、点对点互连，I／O带宽可以从2．5GHz的信号速率扩展到16GBps。相较之下，目前的PCI总线传输率仅有128Mb／s，无疑地，PCI Express在新一代大量数据传输应用中将占绝对优势。尽管目前PCI Express才刚在服务器领域起步，但在PC领域，主导厂商如英特尔希望未来PCI Express能取代AGP或PCI等总线接口，成为单一的高速通用总线标准；而在工控与量测领域，也开始有厂商采用这项标准来增进性能。     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.