基于CL9100／CL9110的MPEG—2解码系统的设计

利用ＭＰＥＧ－２标准压缩的动态图象具有高清晰度和高质量的视听效果，有着广泛的应用前景。本文描述了利用Ｃ－Ｃｕｂｅ的ＣＬ９１００／ＣＬ９１１０芯片组构成的ＭＰＥＧ－２解码系统，内容包括芯片功能介绍，解码系统结构及工作原理。     

变速率调制解调器的DSP实现

介绍了一种较为简单的抗干扰方式－－降低信息速率，分析了当系统采用该方式时系统误码率、误分组概率及信道利用率的提高并给出了仿真结果，最后介绍了如何用数字信号处理芯片Ｃ５０实现了可变速率的调制解调器。     

TS码流的DSP与FPGA结合实现方法

系统层是整个ＭＰＥＧ－２的重要组成部分，但是它的实现十分复杂，至今还没有相对成熟的芯片，且相关设备价格昂贵，本文介绍了利用ＤＳＰ和ＦＰＧＡ通用芯片实现系统层ＴＳ流打包功能的结构和方法。     

TOPSwitch—FX系列高频功率开关控制器TOP232—234的应用

ＴＯＰＳｗｉｔｈｃｈ－ＦＸ系列芯片通过改进布局，集成了新功能，降低了系统造价，同时也提高了设计的灵活性以及性能和能耗效率。文中介绍了新型ＴＯＰＳｗｉｔｃｈ－ＦＸ系列中ＴＯＰＳ２３２～２３４芯片的结构、特点及典型应用。     

STEL-1175在遥感图像压缩编码评估系统中的应用

STEL－1175是一种采用直接数字频率合成技术实现频率合成的集成芯片，详细介绍了此芯片的功能并给出应用在一套实用的遥感图像压缩编码评估系统中的具体实例。     

TS码流的DSP与FPGA结合实现方法

系统层是整个 Ｍ Ｐ Ｅ Ｇ－ ２ 的重要组成部分。但是它的实现十分复杂，至今还没有相对成熟的芯片，且相关设备价格昂贵。本文介绍了利用 Ｄ Ｓ Ｐ 和 Ｆ Ｐ Ｇ Ａ 通用芯片实现系统层 Ｔ Ｓ 流打包功能的结构和方法。     

基于AMBE—1000的双路语音采集系统的设计

介绍了一种基于专用语音编码／解码芯片AMBE－1000的双路语音采集系统，并给出详细的硬件电路设计方法和软件流程。     

多点状态实时监测接口设计

本文利用８２７９芯片设计了一个多点状态实时监视与检测系统，介绍了６４路开关量监测系统硬件结构，给出了监测６４个状态信号的ＭＣＳ－５１汇编语言程序清单。     

MPEG—2解码硬件的实现

本文介绍了ＬＳＩ ＬＯＧＩＣ公司芯片Ｌ６４００７，Ｌ６４００２作为主芯片的ＭＰＥＧ－２系统／视频／音频解码系统，分析了传输液的句法结构；并根据实际工作遇到的技术难点，着重讨论了了解复用模块中的时钟恢复以及视频与音频的同步播放。     

MCM—C的设计和制造

介绍了ＭＣＭ－Ｃ的ＣＡＤ设计方法，以及ＭＣＭ－Ｃ基板的制作与金属化，芯片的测试和老化，芯片互连等工艺。     

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.     

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.     

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.     

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.     

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.     

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.