基于nRF24L01的电子阅读器设计

提出一种2．4GRFID电子阅读器结构,设计了硬件电路及相关软件,克服被动式RFID阅读器识别距离短、不稳定的缺点。在电子阅读器的设计中,采用低功耗单片机和射频芯片,减小阅读器体积。实验表明,该型电子阅读器具有扩展方便、低功耗、可靠性高的特点。     

基于MAX7042的低功耗FSK超外差接收电路设计

采用MAX7042设计了一种308MHz／315MHz／418MHz／433．92MHz低功耗FSK超外差式接收电路，该电路内置CMOS型超外差式射频（RF）接收芯片，具有高集成度、低功耗等特点，灵敏度为-110～-109dBm，接收频移键控（FSK）数据速率可达66kbps（NRZ）或33kbps（曼彻斯特），文中给出了MAX7042主要技术性能、内部结构、工作原理和应用电路。     

高通为下一代无线设备引入了先进的电源管理芯片

码分多址（CDMA）和其它领先无线技术的先驱及创新厂商美国高通公司（Nasdaq：QCOM）公布了一款新的电源管理芯片（IC），这是专为支持下一代移动电话先进功能而设计的。与公司融合平台MSM^TM基带解决方案和radioOne射频（RF）芯片配合，PM7500^TM可以提供能无缝运行且功耗优化的全面系统解决方案。     

NPS-1数字神经元芯片的实现与应用

本文设计了数字神经元芯片NPS-1，其结构简洁，易于级联，用FPGA实现样片，集成度约一万门电路以阿拉伯数字识别和双向存储器为例，测试结果表明，该芯片设计、实现正确，同时结构简洁，适于实时处理的嵌入式神经网络应用系统     

某型号射频、视频同轴连接器性能检测

本文首先简述了射频、视频同轴连接器在通信系统中的作用，指出了性能检测的必要性和重要性。然后，针对几个主要的检测项目，介绍了简便的检测方法。针对检测中出现的问题，一一进行了排除。最后给出了检测结果，证实了所检测产品的质量符合技术指标要求。     

微处理器Rabbit2000与液晶显示控制器KS0108B的接口及编程

介绍以Rabbit2000型微处理器为核心的RabbitCore RCM2200型模块和三星公司的KS0108B型液晶控制器，并以TRULY公司的M12864-7A7型液晶显示模块为例。用Rabbit2000型微处理器作为主控芯片，采用DynamicC编写液晶显示程序。     

广晟微电向TD更高处挺进

广晟微电子有限公司致力于推动中国TD射频芯片的发展，2008年成功将第一代TD—SCDMA射频芯片推入市场。广晟微电子第一代TD—SCDMA射频芯片的市场占有率超过70％，目前，广晟微电子TD—SCDMA射频芯片已被国内一大批企业采用，并得到了产业链下游企业的高度认可，在射频集成电路核心芯片领域奠定了坚实的行业基础和市场地位。采用广晟微电子射频方案的HSDPA数据卡实现大规模商用，北京奥运会TD数据卡绝大部分采用广晟微电子的射频方案。     

基于DSP的串行外设通信的实现方法

介绍了基于数字信号处理芯片TMS320F241的串行外设接口(SPI)与外设实现串行通信的方法，并以X5043为例，给出了用SPI实现电子标签功能的方法。     

射频识别技术及其应用

射频识别技术（RFID）利用射频信号通过空间耦合（交变磁场或电磁场）实现无接触信息传递,并通过所传递的信息达到识别的目的。RFID是当今自动识别数据收集（AIDC）行业发展最快的板块之一,被广泛应用于物流、制造、公共信息服务等行业,可大幅度提高管理与运作效率,降低成本。研究射频识别技术,将之应用到国民生产和生活中去,具有战略性的重大意义。本文对RFID的系统模型、实现原理和实现的关键技术进行了介绍,同生活中的条形码进行了区分,并简述一些应用实例,以加深对RFID的了解和认识。     

阶梯型射频SAW滤波器的计算机模拟

简述了射频声表面波滤波器(RF—SAWF)的研究进展，讨论了谐波法中的阶梯型又指换能器(IDT)结构的等效电路模型。并根据该模型计算并模拟了RF—SAWF的幅频响应，模拟结果证明阶梯型IDT可有效地激发高次谐波，抑制基波和其他无用谐波。     

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.