EZ-USB FX2接口在诱发电位仪系统中的应用

随着外围设备的多样化和大量数据传输的需要,USB接口应用范围越来越广泛。介绍EZ-USB FX2接口在诱发电位仪系统中的应用。首先给出了整个诱发电位仪的总体设计,讨论了FPGA作为主芯片与EZ-USB FX2的硬件连接,在此基础上重点论述了基于Slave FIFO模式的EZ-USB FX2接口设计及相应固件程序开发。该应用实现了大脑诱发电位仪传输的高可靠性、高速化、小型化,具有良好的市场前景。     

基于EZ-USBFX2的固件程序设计

简要介绍了支持USB2.0协议的接口芯片EZ-USB FX2的基本特性,详细分析了EZ-USB FX2的固件框架和固件函数库,并给出了如何在该固件框架下使用C语言对EZ-USB FX2芯片进行固件程序开发的具体方法.     

基于USB2.0的非制冷红外热像仪图像处理系统

采用基于USB2.0总线技术和视频解码芯片SAA7114完成对红外图像的采集,利用FPGA实现视频数据流的收发时序,通过USB接口芯片EZ-USB FX2 CY7C68013与主机进行通信。系统具有灵活性、即插即用、自动配置资源、应用广泛。     

基于FPGA的数据采集系统的设计与实现

基于FPGA和USB2.0的技术方案,设计了一种高速化和集成化的数据采集系统。该系统是以Altera公司的FPGA芯片EP2C5T144为主控芯片,以Cypress公司的EZ-USB FX2芯片为传输手段设计实现的。首先详细介绍了整体系统的框架结构和硬件接口电路,其次,在硬件平台完成的基础上采用Verilog HDL硬件描述语言设计完成了FPGA控制接口电路的代码,并设计完成了USB2.0的固件程序。最终通过软硬件系统联调完成了系统测试,该测试结果表明整个系统功能正确,能够完成一般情况下数据采集的任务需求。     

一种基于USB 2.0的实时数据采集系统设计与实现

结合当前实时数据采集系统面临的问题和USB总线的突出优点,提出了一种基于USB 2.0总线技术的实时数据采集系统的设计及具体实现方法.根据要设计的系统的要求,给出了硬件电路框图,通过比较,选取了A/D芯片和USB通信接口芯片,并对Cypress公司的EZ-USB FX2芯片做了简单介绍.围绕EZ-USB FX2芯片,进行系统软件包括固件程序、设备驱动程序和应用软件的开发设计,详细介绍了设备固件程序的设计,给出了流程图和主要的代码.并对基于USB总线的数据采集系统的未来发展做了展望.     

基于EZ-USB FX2的数据采集系统USB接口设计

以CYPRESS公司的EZ-USB FX2芯片为基础,对工业CT数据采集系统的USB接口设计所涉及的几个方面进行了详细的介绍。该设计中为了能提高数据传输的速度,EZ-USB芯片采用Slave FIFO接口方式,在此方式下,USB内核不参与数据的传输。CY7C68013A芯片内部包含有4 KB的可配置端点缓冲区,这是大容量数据传输端点,可配置成不需要8051固件参与就同外围电路完成高速数据传输端。CYPRESS公司提供的EZ-USB固件程序开发包中包含有固件程序的基本框架。在此介绍CY7C68013A芯片的结构和特点,分析EZ-USB FX2固件程序框架,并给出固件程序实例代码,描述固件代码装载方式,应用程序调用驱动程序的接口函数。采用EZ-USB芯片开发USB接口,大大降低开发难度,提高开发效率。     

基于USB-ATA接口的海量存储器的设计与实现

介绍了一种基于通用可编程接口(GPIF)的通用串行总线-高级技术配件(USB-ATA)解决方案,将普通硬盘转化为USB Mass-Storage,采用Cypress公司的 EZ-USB FX2系列芯片.该设计采用CY7C68013芯片的ATA接口,将普通硬盘转化为具有USB2.0速度的海量存储器,其灵活的接口和可编程特性简化了外部硬件的设计,提高了系统的稳定性,也有利于印制板的制作和调试.USB设备的可热插拔特性使得该系统具有便携式的特点,使用方便,无需关机重启或打开机箱进行安装.该系统实现了可编程输入输出(PIO)和超级直接存储器存取(UDMA)两种模式,实际运行效果良好,达到USB2.0的高速率传输要求.     

无线激光通信系统USB接口的设计与调试

提出一种无线激光通信系统USB接口的设计方案。该方案采用Cypress公司EZ-USB系列的AN2131Q芯片为核心作为USB外围设备,AN2131Q芯片在USB外围设备上电加载后运行其固件程序,负责管理USB外围设备及其与主机的通信。论述了如何利用该公司的EZ-USB开发板和配套软件调试系统。     

基于AT91SAM7S64的USB/LPT转接系统的固件设计

基于AT91SAM7S64单片机设计并实现USB/LPT转接系统,给出固件设计的相关技术细节.通过该转接系统,使传统LPT接口的设备和仪器可方便地通过USB接口接入到计算机主机系统.     

基于EZ-USB FX2的单向传输系统设计与实现

为了满足不同安全等级主机间单向数据传输的应用要求,介绍了一种基于EZ-USB FX2实现的单向传输系统设计方案,采用通用串行总线USB2.0芯片Cy7c68013和先入先出存储器IDT72v06,通过Cy7c68013通用可编程接口与外部先入先出的连接,实现了在不同安全域主机之间单向、高速、安全可靠的数据传输.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

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.     

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.     

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.     

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.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

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.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks