铁电存储器FM25CL64在DSP系统中的应用

介绍了一种新型铁电存储器FM25CL64,分析了TMS320VC5402 DSP的SPI引导装载模式,给出了一种基于铁电存储器FM25CL64的DSP脱机独立运行系统的设计方案,该方案已成功地应用到一种语音门锁系统中。     

TL16C750在异步串行通信中的应用

文中通过扩展异步通信芯片 TL16C750 实现 DSP 和 PC 机之间的异步串行通信,从而增强系统的通信接口控制能力。介绍了 TL16C750 的性能及与通信有关的寄存器,给出了 TL16C750 在 TMS320VC33 与 PC 机串行通信系统中的硬件应用电路及 TMS320VC33 初始化 TL16C750 的软件编程。     

基于PCI总线的DSP高速串行数据接收系统

本文介绍了基于PCI和DSP的高速串行数据接收系统的原理，给出了系统中高速串行数据通信接收芯片CY78933与TMS320VC33以及PCI接口控制芯片CY7C09449PV的无缝连接方案、设计思路及实现方法。     

铁电存储器FM3808在DSP并行引导转载模式中的应用

本文介绍了美国Romtron公司生产的一种新型非易失、超低功耗的铁电存储器FM3808的性能特点、内部结构和工作原理，同时还分析了TMS320VC5402 DSP的并行引导装载模式，给出了DSP与FM3808组成的并行引导接口方案。     

基于TL16C552的DSP串并行通信扩展技术研究

TL16C552是TI公司生产的异步通信芯片 ,该芯片可在通信系统的实时性要求较高时 ,用来实现系统的高速串行通信和打印口扩展 ,从而增强系统的通信接口控制能力。文中介绍了TL16C552的性能及与通信有关的寄存器 ,给出了TL16C552在DSP器件TMS320VC33与PC机通信系统中的硬件应用电路及通过TMS320VC33初始化TL16C552的软件编程     

铁电存储器FM3808在TMS320VC5402系统中的应用

FM3808是Ramtron公司生产的新型超低功耗非易失铁电存储器，该器件可支持对存储区的高速读写，并可进行近乎无限次的写入。FM3808内部除具有256kB的存储阵列外还集成了实时时钟和系统监控模块，因而功能十分强大。文中介绍了FM3808的性能特点、内部结构和工作原理，分析了TMS320VC5402 DSP的并行引导装载模式。给出了DSP与FM3808组成的并行引导接口方案。     

铁电存储器在数字信号处理系统中的应用

介绍一种新型FM18L08型铁电存储器，分析TMS320VC25402型数字信号处理器(DSP)的并行引导装载模式，给出一种基于铁电存储器的DSP脱机独立运行系统的设计方案，并将该方案成功地应用在一种语音门锁系统中。     

基于DSP的能见度测量系统的设计

主要介绍了一种基于DSP开发的能见度的测量系统,在阐述该系统设计原理的基础上介绍了以TMS320VC5410 DSP芯片为核心的硬件结构体系;同时也介绍了系统基于图像处理技术的软件算法和实现。该系统主要由模拟视频采集电路,A/D转换电路,DSP中央控制单元,外部存储器,标准串行口及外围电路组成;程序的优化方面包括数据预处理和采用浮点运算器TMS320VC5410的各种优化方法进行的数据处理。     

基于DSP和X5165芯片的非易失性数据存储设计

介绍了数字信号处理器TMS320LF2407A的串行外设接口，给出了EEPROM存储器X5165与TMS320LF2407A的硬件连接电路和应用程序实例。     

高性能浮点DSP芯片TMS320VC33

TMS320VC33是美国TI公司新推出的TMS320CX系列新一代浮点式数字信号处理器。它以高速、低功耗,低成本、易于开发为显著特点。是通信、手机、MODEM、DVD、便携式仪器仪表中需要进行浮点运算应用中的一种理想DSP器件。文中介绍了TMS320VC33的硬件结构、性能特点、指令系统、仿真工具和开发环境,最后给出了由TMS320VC33组成的最小应用系统。     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

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.