超高频窄带单级低噪声放大器的设计

文中介绍了一款超高频窄带低噪声放大器电路,该电路结构小巧(20 mm×13 mm,厚度为0.6 mm),功能可靠、稳定。放大器芯片采用3SK318YB,该芯片具有高增益、低噪声等特点。电路主要用于超高频段微波通信,电路拓扑结构采用反馈型、稳定衰减器法和低端增益衰减法进行设计。生产成品并经测试,该产品性价比高,完全达到了设计要求。     

红外遥控调光灯的设计

<正> 本文主要介绍了红外遥控调光灯的基本原理和硬件电路设计,由红外发射电路和接收控制电路两部分构成。文中采用集成芯片进行设计,电路结构简单、成本低、遥控距离8m 左右,可应用于家庭照明。     

采用Flat_Cell技术的ROM设计和分析

Flat_Cell ROM具有高密度和高性能的优点。本文介绍了Flat_Cell结构和采用Flat_Cell技术的ROM设计方法。包括Flat_Cell的工艺技术、Flat_Cell基本电路结构和ROM放大器电路。     

一种基于0.18μm CMOS工艺的上电复位电路

介绍了一种采用0.18μm CMOS工艺制作的上电复位电路。为了满足低电源电压的设计要求,采用低阈值电压(约0V)NMOS管和设计的电路结构,获得了合适的复位电压点;利用反馈结构加速充电,提高了复位信号的陡峭度;利用施密特触发器,增加了电路的迟滞效果。电路全部采用MOS管设计,大大缩小了版图面积。该上电复位电路用于一种数模混合信号芯片,采用0.18μm CMOS工艺进行流片。芯片样品电路测试表明,该上电复位电路工作状态正常。     

真空微电子平板摄像管10×10像素驱动电路的设计与制作

真空微电子平板摄像是一种全新的摄像理论,它采用碳纳米场发射阴极、栅极和阳极(收集极)三极管结构。介绍了真空微电子平板摄像管驱动电路的设计要求、设计思路和电路测试结果,实验中采用的栅极驱动对驱动电路(扫描电路)起到了关键作用。     

一种大间距短波线列红外探测器用读出电路的设计

介绍了一款大间距双波段短波线列红外探测器用读出电路的设计详情,电路采用CTIA输入方式,模拟通道采用11级TDI进行信号的时间延迟累加平均。文章主要介绍了电路输入级、列级信号处理电路的设计及仿真分析,给出了全电路的整体仿真结果,并在文章最后介绍了电路实际测试结果。     

混合集成三路DC／DC变换器的研制

本文介绍了一种采用混合集成工艺制作的具备三路输出的DC／DC变换器模块电路,叙述了该电路的设计方案和关键单元电路的设计过程,并介绍了主要的工艺流程。     

CM303双二选一模拟开关电路

本文主要介绍CM303双二选一模拟开关电路的基本结构,包括从电路的版图设计、工艺设计原则,以及采用埋层外延技术,本电路以实现消除闭锁现象为目的。给出了制造工艺条件对外延材料的选择关系,最后给出了电路的性能指标。     

混合集成可编程功率信号源的设计与应用

介绍了一种采用混合集成工艺制作的、具备多种波形和多种频率、且可选择输出的功率信号源模块电路的设计方法,给出了该电路的总体电路结构和关键单元部件的设计过程。同时给出了相关参数的测试原理。     

基于0.18 um CMOS工艺的100G以太网物理编码子层发送芯片的设计实现

本文介绍了一个以太网物理编码子层(PCS)发送电路。该电路基于IEEEP802.3ba和IEEEP802.3bm/D1.1标准,电气接口为4?25Gb/s,采用半定制设计方法设计。该发送端PCS电路主要由64B/66B编码器,扰码器,多通道分发模块和66:8变速箱等四个模块组成。电路采用流水线设计并进行了优化,从而大大提高了电路的运行速度。还采用并行扰码及逻辑优化技术以提高电路的性能。此外,设计变速箱电路时,采用了一种与相位无关的结构,确保了电路在高速下运行的稳定和可靠性。该PCS层发送电路采用0.18?m CMOS工艺实现,并提交流片,芯片面积为1.7′1.7=2.89mm2,1.8V电源供电时的功耗为284mW。后仿真结果表明电路功能正确,满足100Gb/s的速率要求。     

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