镍镉电池高倍率充电器

随着便携式电器设备的日益普及,镍镉电池越来越广泛地被应用,充电器的使用也越来越频繁。一般的充电电路不仅充电时间长,而且需要人来监视充电电压和电池的温度,以防止过充电,使用起来很不方便。本文介绍的镍镉电池高倍率充电器,对常用的AA型5号镍镉电池进行半小时高倍率充电,充满后自动将充电电流降为20mA进行涓流充电,并且具有可靠的温度、电压保护功能。     

可编程镍镉电池充电器设计

介绍了可编程镍镉电池快速充电控制器专用芯片ＭＡＸ７１２的特点和功能、快速充电器电路原理与应用。该充电器具有多种可编程功能，使充电过程完全自动化，充电时间短，效率高，使用方便灵活。     

具有定时功能的镉镍电池充电器

普通充电器的充电时间都是人工控制的，因此，在各种因素的影响下，往往会造成充电不足或过充电。本文介绍一种定时充电器，充电时间可在5～25小时内调节。充电过程中如发生停电，它具有累积计时功能。     

新型太阳能镍镉电池充电器

在远离电网的地方或长期野外工作，随身携带的CD、MP3等电子设备主要采用电池供电，如何对使用的电池进行充电，就成为一个问题。本文介绍一种用太阳能给镍镉电池充电的充电器。     

带有数据显示功能的锂电池和镍镉电池充电系统

本系统以PIC16F873单片机和LTC4002锂电池充电芯片为核心,针对不同电池的特性,采用不同的充电方式,可以对目前广泛使用的锂电池和镍镉电池充电,同时具有实时显示充电及放电电流、电池电压、容量统计和电池特性等功能,实现了符合铁道部所有相关规范的列车尾部保护装置的充电系统。     

镍镉电池快速充电控制电路U2402B

镍镉电池快速充电控制电路Ｕ２４０２Ｂ黄小平Ｕ２４０２Ｂ是ＴＥＬＥＦＵＮＫＥＮ半导体器件公司生产的镍镉电池快速充电控体电路，使用双极型工艺一的电路芯片，它可构成一高效廉价的充电系统。此电路将智能型多斜率电池电压监控电路和电源相位控制结合在一起；还具有充...     

一种新型镍镉电池快速充电器

鉴于通常的镍镉电池充电器采用分立元件做成 ,充电效果差。文章应用集成电路MAX712构成了镍镉电池快速充电器 ,介绍了集成电路MAX712的原理 ,列出了该芯片的编程方法 ,并给出了采用该芯片所构成的快速充电器实际应用电路 ,实验证明充电效果很好。     

简易镍镉电池充电器的设计

本文介绍了一种简易镍镉电池充电器的设计。该设计具有并联式、脉冲电流充电的特点，可以保证充电电池电量基本一致，充电高效快捷，有充电完成自动断电并发出指示功能。     

镍镉电视的完整分析

英国ＰＡＧ公司素有为传统问题找到革新性解决方法的名声。这方面的一个典型是ＡＣＳ微机控制的高级充电系统的开发，该系统最初的开发成果十年前已用于Ｓｐｅｅｄｃｈａｒｇｅ ６０００系统。现在，ＡＣＳ系统（增强型）用于最新的ＡＲ系列充电器。它们能对现用的各种类型的镍镉电池组进行充电，同时还能解决现代用电池的设备遇到的大多数令人头疼的问题。     

TL431在镉镍电池充电电路中的一种应用

本文介绍了TL431在镉镍电池充电电路中的一种应用，分析了电路的工作原理。     

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