一种分区式高速12位A／D转换器

介绍了一个高速１２位分区式Ａ／Ｄ转换器的设计。电路采用“３位＋３位＋８位”的三级分区式结构。其中的８位ＡＤＣ为折叠插入式ＡＤＣ，误差校正采用模拟校正、数字编码形式。采用２μｍＢｉＣＭＯＳ设计规划设计的电路，经ＰＳＰＩＣＥ仿真，在±５Ｖ电源下，采样频率高达３ＭＨｚ。     

适于嵌入应用的一种25MS／s8位CMOSA／D转换器

适于嵌入应用的一种２５ＭＳ／ｓ８位ＣＭＯＳＡ／Ｄ转换器＝Ａ２５ＭＳ／ｓ８－ｂｉｔＣＭＯＳ．Ａ／Ｄｃｏｎｖｅｒｔｃｒｆｏｒｅｍｂｅｄｄｅｄａｐｐｌｉｃａｔｉｏｎ［刊，英］／Ｐｅｌ－ｇｒｏｍ，ＭＪＭ…∥ＩＥＥＥＪ．Ｓｏｌｉｄ－ＳｔａｔｅＣｉｒｃｕｉｔｓ．...     

新型12位高速,微功耗A／D转换器ADS7822及其应用

新型１２位高速、微功耗Ａ／Ｄ转换器ＡＤＳ７８２２及其应用李洪宾ＡＤＳ７８２２是一种可在２．７～３．６Ｖ的电源电压下工作的１２位Ａ／Ｄ转换器，根据情况的不同也可在２．０～５Ｖ的电源电压下工作，ＡＤＳ７８２２的参考电压可在５０ｍＶ到ＶＣＣ之间任意设置，参...     

高分辨率D／A和A／D转换器的电路实现

介绍通过５１系列单片机外扩８位Ｄ／Ａ和Ａ／Ｄ转换器。将原来的８位分辨率提高到１６位分辨率的方法，包括用两个ＤＡＣ０８３２构成１６位Ｄ／Ａ、用ＡＤＣ０８０４和ＤＡＣ０８３２构成１６位Ａ／Ｄ以及任意分辨率Ａ／Ｄ转换器的实现。这些方法具有电路和编程简单、投资节省等特点。     

一种视频8位CMOS折叠—插值A／D转换器的设计

ＣＭＯＳ折叠式Ａ／Ｄ转换器结构是一种能兼顾面积，功耗与转换速度的新型结构，分析了折叠－插值Ａ／Ｄ转换器的原理，着重介绍一种８位ＣＭＯＳ折叠－插值电路的设计考虑和版图设计，最后给出了模拟结果。     

STATIC RAM接口模式下AD7574的应用

本文介绍了ＡＤ公司的８位ＣＭＯＳＡ／Ｄ转换器ＡＤ７５７４在ＳＴＡＴＩＣ ＲＡＭ上与四种ＣＰＵ的接口方式，给出了四种ＣＰＵ汇编语言的程序清单和使用中应注意的一些问题。     

一种单片8位高速乘法型D／A转换器

采用硅双极工艺制作了一种单片８位高速乘法型Ｄ／Ａ转换器。该电路具有精度高、速度快、与各种逻辑兼容、使用灵活等特点，在数据采集、数据处理系统、ＣＲＴ、波形产生器、Ａ／Ｄ转换器、伺服马达、ＶＣＤ、可编程电源、音响编码及衰减器、高速调制及解调装置中具有广泛的应用前景。     

单片8位视频A／D转换器AD9048

单片８位Ａ／Ｄ转换器ＡＤ９０４８是高速Ａ／Ｄ转换器。本文在对该转换器作一般介绍的基础上，对其极限参数，引脚，工作原理作了较为全面的介绍。     

一种具有微处理器接口的CMOS12位电流型D／A转换器

研究了采用译码的分段梯形电阻网络技术制作的高速１２位ＣＭＯＳ电流型Ｄ／Ａ转换器，将常规的Ｒ－２Ｒ电阻网络和译码的权电阻网络相结合，解决了常规ＣＭＯＳＤ／Ａ转换器必须采用精密Ｒ－２Ｒ梯形电阻网络的问题，降低对电阻精度区配的要求。     

VGA转NTSC/PAL多功能变换器AL128及其应用

ＡＬ１２８是美国ＡｖｅｒｌｏｇｉｃＴｅｃｈｎｏｌｏｇｉｅｓ公司生产的新型ＶＧＡ转ＮＴＳＣ／ＰＡＬ多功能变换器。它在片内集成了完整的数字视频微处理器、数字电视信号解码器、ＲＧＢ三路８位Ａ／Ｄ转换器和９位Ｄ／Ａ转换器。本文介绍了ＡＬ１２８的主要参数、引脚功能及应用。     

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