三端可调稳压器的PSpice宏模型

本文介绍了一种简单实用的用于ＰＳｐｉｃｅ程序的ＬＭ１３７ＨＶ宏模型，该模型较好地模拟了其直流工作特性、温度特性、瞬态特性、纹波抑制比以及某些极限参数。以此模型为基础进行扩展，建立了一系列三端可调稳压器的宏模型库。     

深亚微米CMOS混合信号电路衬底噪声耦合宏模型

提出了一种基于二维器件模拟的深亚微米工艺外延型衬底的电阻宏模型.该宏模型通过器件模拟与非线性拟合相结合的方法建立,使衬底寄生参数的提取更加方便,同时保障了深亚微米电路特性的模拟精度.此外,该宏模型结构简单,可以得到与器件模拟基本一致的模拟结果,并可以方便地嵌入SPICE中进行一定规模的电路模拟.     

模拟乘法器的宏模器

本文提出了一个由构造法建立的模拟乘法器的宏模型，该模型可以模拟乘法器的动态特性、静态特性与非线性特性的十几种特性参数，并且电路简单，是一个比较全面而实用的模型。     

基于非线性受控电压源的单电子晶体管宏模型

提出了一种新颖的基于非线性受控电压源的单电子晶体管宏模型.该宏模型通过受栅压和温度控制的非线性受控电压源使温度效应和栅控效应的模拟更加方便,并提高了单电子晶体管特性的模拟精度.此外,该宏模型结构简单,可以利用极小的计算机资源得到与传统的蒙特卡罗方法基本一致的模拟结果,并可方便地嵌入SPICE中进行一定规模的单电子晶体管电路的模拟.     

基于非线性受控电压源的单电子晶体管宏模型

提出了一种新颖的基于非线性受控电压源的单电子晶体管宏模型.该宏模型通过受栅压和温度控制的非线性受控电压源使温度效应和栅控效应的模拟更加方便,并提高了单电子晶体管特性的模拟精度.此外,该宏模型结构简单,可以利用极小的计算机资源得到与传统的蒙特卡罗方法基本一致的模拟结果,并可方便地嵌入SPICE中进行一定规模的单电子晶体管电路的模拟     

无限大平行板间轴对称电子束二维静电PIC模拟程序设计

利用粒子模拟方法（PIC）,用Fortran语言进行程序设计,对无限大平行板间轴对称电子束的运动进行二维模拟。在该程序设计中,宏粒子采用环宏粒子模型,用体积加权模型将每一个宏粒子电量分配到格点上,相对于面积加权模型更加精确。与通常数值模拟方法相比,PIC方法得出各个宏粒子的瞬态运动特性。最后通过以Magic仿真软件的计算结果为标准进行验证,证明了该算法的准确性。     

数字式光伏阵列模拟器的设计研究

根据光伏电池阵列的输出I-U特性曲线,提出了一种基于四折线法来进行光伏电池阵列输出曲线的分段拟合方法,并在此基础上设计了基于Buck电路的太阳能电池模拟器。该模拟器采用输出电流反馈PI调节来提高系统的动态性能及稳态精度。文中同时给出了一种新的Simulink仿真模型,并通过该模型验证了本设计的合理性。     

无限大平行板问轴对称电子束二维静电PIC模拟程序设计

利用粒子模拟方法(PIC),用Fortran语言进行程序设计,对无限大平行板间轴对称电子束的运动进行二维模拟.在该程序设计中,宏粒子采用环宏粒子模型,用体积加权模型将每一个宏粒子电量分配到格点上,相对于面积加权模型更加精确.与通常数值模拟方法相比,PIC方法得出各个宏粒子的瞬态运动特性.最后通过以Magic仿真软件的计算结果为标准进行验证,证明了该算法的准确性.     

基于混合宏模型的无电容型LDO设计

模拟集成电路的"自顶向下"设计方法能大大提高电路设计效率.提出了一种"混合宏模型",能高效、简便地完成模拟集成电路的建模,进而指导器件级电路设计.基于"混合宏模型"的设计方法,完成了一款基于HHNEC 0.25 μm标准CMOS工艺的无电容型LDO设计.     

模拟乘法器的宏模型

本文提出了一个由构造法建立的模拟乘法器的宏模型,该模型可以模拟乘法器的动态特性、静态特性与非线性特性的十几种特性参数,并且电路简单,是一个比较全面而实用的模型。     

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