基于CPLD的多通道快速数据栈区设计

利用在系统可编程逻辑器件ispLSI6192芯片构造4个双向并独立的128×9位FIFO高速数据存储栈区(FIFO),并利用芯片内部快速进位逻辑建立快速地址寄存器和地址自动加1计数器,同时利用该芯片的门阵列建立FIFO控制逻辑,控制逻辑分别对4个FIFO栈区进行读写管理控制;即将系统的高速数据栈区及其控制逻辑功能做在同一个芯片上,从而提高计算机数据管理通信的速度、效率,以及提高系统的集成度和降低系统的故障率。     

基于EDA技术的高速FIFO设计

利用Lattice公司的在系统可编程逻辑器件ispLSI6192芯片构造4个双向、独立的128×9位F IFO高速数据存储栈区(FIFO),并对芯片可编程逻辑编程建立快速地址加1计数器以及FIFO控制逻辑,控制逻辑分别对4个FIFO栈区进行读/写控制;实现将系统的高速数据栈区及其控制逻辑功能在同一个芯片上实现,从而提高计算机数据通信的速度、效率以及提高系统的集成度和降低系统的故障率。     

基于FPGA和DSP的多路同步数据采集系统设计

为了满足对开关电源实时测量的应用需求,设计了一种基于FPGA和DSP的多路同步实时数据采集系统,该系统利用可编程逻辑器件FPGA将多个功能模块连接在一起,完成了对A/D转换芯片及双口等模块的控制,同时利用DSP进行高速数据运算和处理;文中给出了系统硬件原理框图,并结合系统的设计方案对其中的主要功能模块进行了阐述;该多路同步数据采集系统具有实时性强、集成度高、扩展性灵活等特点。     

视频图像处理系统CPLD控制和EDMA数据搬移的实现

介绍一种视频图像的采集和处理系统.系统由CCD摄像头、视频解码芯片SAA7111、可编程逻辑芯片CPLD、先进先出FIFO存储器,以及数字信号处理器DSP等组成.详细讨论CPLD对图像采集速度和数量的控制及LEDMA图像数据搬移的实现方法.实践证明,该系统可以精确地控制图像大小,CPU可以专注于图像处理,而频繁的数据从FIFO到外部SDRAM、SDRAM到内部RAM的搬移工作完全交给EDMA在后台实现,提高了图像数据的传输效率,充分发挥DSP的高性能,使得系统设计简捷清晰,调试极为方便.     

基于USB2．0和线阵CCD的高速数据采集系统设计

为了解决电荷耦合器件(CCD)图像数据高速采集和实时传输处理问题,设计了一种基于USB2.0的高速CCD数据采集系统.系统采用可编程逻辑(CPLD)实现时序控制和逻辑控制,专用视频信号处理芯片XRD4460实现高速A/D转换;为了保证CCD图像数据高速传输,采用先进先出(FIFO)作为CCD数据流与8051单片机之间的缓存区进行数据缓存,采用CY7C68013接口芯片的GPI接口模式完成控制信号的发送以及实现采集系统与计算机之间的数据高速传输.     

双口RAM在PCI总线与AVR接口设计中的应用

为了提高PCI总线与AVR单片机之间的数据传输速度,利用双lJ＇RAM通过共享的方式实现PCI总线与AVR单片机之间的高速数据交换。利用有限状态机方法将PCI接口芯片局部端逻辑转换为双口RAM读写控制信号和地址数据信号,并通过仿真工具ModelsimSe对接口电路进行了验证,得出的仿真波形符合要求;利用乒乓操作方法实现PCI接口芯片和AVR单片机交替读／写数据存储区,有效提高了PCI总线与AVR单片机之间的数据传输速度。实践证明该设计方法是解决高低速设备的传输瓶颈问题的有效途径。     

基于FPGA的高温数据采集系统设计

这是一个基于FPGA的高速耐高温数据采集系统,该系统采用FPGA作为控制器,采用Verilog语言控制时序,利用FPGA内部自带的RAM设计16位的FIFO,实现数据的缓冲存储,主要完成电平偏移、A/D转换控制、数据缓存FIFO三部分功能。系统所选器件都为耐高温低功耗芯片,适用于油田井下高温作业。仿真及实验测试结果显示,所设计的数据采集系统达到了预期的功能。     

基于FPGA的多通道高速数据采集系统

为满足某雷达实验平台的需求,设计并实现了一种基于通用串行总线USB的多通道高速数据采集系统。该系统以现场可编程门阵列（FPGA）为核心,利用多组高采样率AD实现多通道高速采集。为保证数据通路的畅通,每通道配备大容量DDR2进行高速数据缓存,并利用DDC降低数据写入速率。系统采用EZ_USBFX2LP系列USB芯片的Slave FIFO接口方式将数据回传至计算机中,由计算机应用程序进行控制、数据采集和波形显示。整个系统由硬件部分、FPGA内部逻辑、USB固件、设备驱动和应用程序构成。经过测试,系统在80MHz采样率下,可以实现中心频率60MHz、带宽10MHz信号的有效采集。测试结果验证了设计方案的正确性和可行性。     

基于AD9238的高速高精度ADC采集系统

介绍了ADI公司的高速AD芯片AD9238和TI公司的高速FIFO芯片SN74V245的主要特性和工作原理.详细说明了利用MCU芯片AN2131Q来控制AD和FIFO芯片以构成高速、高精度数据采集系统的具体实现方法,并对其采样结果进行了分析.     

基于通用串行总线和有限状态机的数据发送系统设计

设计了基于高速数据接口和有限状态机逻辑控制的数据发送系统.可实现通过PC机发送测试数据和保存的实验数据至数据处理系统的应用,便于数据处理系统特别是其中硬件部分的调试和检测.灵活性好,通过修改FIFO接口数据的读写方式可以适应多种不同系统数据接口.     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first