高压隔离高线性度光电耦合器

研制了一种高压隔离高线性度光电耦合器.采用混合集成技术,在6DIP陶瓷管座内成功制作出了高压隔离线性光电耦合器.叙述了该器件的工作原理、工作特性及设计考虑,并在在此基础上进行了实验,实验结果表明此器件具有结构简单、精度高、线性度好的优点.     

小型化光电隔离型长线差分收发器

设计了一种小型化光电隔离型长线差分收发器,采用光电隔离的方式实现差分收发器信号的隔离传输,重点突出了其小型化特点和电气隔离功能.叙述了该器件的工作原理和结构设计,简要介绍了其制作过程.最后介绍了器件的主要性能参数及测试结果,表明该器件同时具备差分信号隔离与传输的功能.     

基于线性光耦HCNR201双极性信号隔离电路

在瞬变电磁勘探中,需要在高压强电磁环境下采集电磁信号进行反褶积运算.如果模拟量与数字量之间没有电气隔离,那么高压很容易窜入低压器件并将其烧毁.设计了一个基于高精度线性光耦器件HCNR201双极性信号隔离转换电路,并介绍了高精度线性光耦器件HCNR201的主要特性及工作原理.应用于实际仪器的实验结果表明,该电路具有良好的线性度、准确度和适用性.     

单电源线性光电耦合器的研制

研制了一种单电源线性光电耦合器,器件采用隔离式DC/DC电源供电.叙述了该器件的工作原理和部分电路设计,分析了研制过程中遇到的一些问题及解决办法.给出了主要参数的测试结果,结果表明该器件具有很好的隔离特性和线性度.     

高压隔离高容驱动光电耦合器的研制

介绍了采用有机硅凝胶(双组分)灌封技术,在陶瓷管座内制作而成的一种新型光电耦合器.其隔离电压可达10 kV以上,驱动负载电容可达3 000 pF以上.叙述了该器件的工作原理、工作特性、设计思想及制作过程,理论分析和大量的实验表明,该器件具有响应速度快、结构简单、性能稳定、可靠性高等优点.     

高压隔离光电耦合器的设计和制作

分析了影响绝缘材料击穿特性的几个主要因素,在此基础上设计并制作了高压隔离光电耦合器,实验结果表明该器件具有良好的隔离特性和高的可靠性能,隔离电压最大值达10000V.     

一种车用高边智能功率开关电路的研制

介绍了一种汽车用高边智能功率开关电路的工作原理。对该电路所涉及的功率ＶＤＭＯＳ器件、隔离技术及ＣＭＯＳ／ＶＤＭＯＳ兼容工艺设计进行了详细分析，最后给出了实验结果。     

低漏电常闭型光电隔离开关设计

研制了一种新型的低漏电常闭型光电隔离开关。介绍了该光电隔离开关的工作原理、参数设计。通过特别的结构设计实现了对微小漏电流的控制,并对其进行了工艺改进,提高了器件可靠性。器件测试结果显示,参数指标达到设计值,从而验证了设计的有效性。     

基于左手传输线的威尔金森功分器设计

提出了一种新型的基于左手传输线的威尔金森功分器,该器件利用左手传输线具有非线性色散的特性,使用L-C元件构成的-λ/4左手传输线来取代传统功分器的右手传输线构成分支臂。仿真和实验结果表明该新型的功分器能有效增加器件的隔离带宽,缩小器件的尺寸。同时仿真与实验测试结果很好的一致。     

便携式X射线机电参量测量电路的研究

便携式X射线机是典型的用弱电信号控制强电的测控设备,电气隔离及控制精度至关重要.目前主要采用电磁耦合方式实现其电气隔离,虽具有较高的线性度和隔离性,但耦合器件带宽窄、体积大、工艺复杂、成本高.为此,本文提出基于高精度线性光耦HCNR201的电压、电流测量电路.该电路频带宽、体积小、结构简单、成本低.同时实验结果表明:电路稳定性好、线性度高,具有良好的使用价值.     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first