RF-CMOS建模:一种改进的累积型MOS变容管模型

提出一种改进的累积型MOS变容管射频模型,改进后模型方程可精确描述累积型MOS变容管全工作区域特性;模型方程连续,且任意阶次可导,至少三阶导数求解结果可实现与测试结果的精确拟合,解决了原模型可导但导数错误、变阻方程不连续等问题.模型最终应用到采用CSM(Chartered Semiconductor Manufacture Ltd)0.25μm RF-CMOS工艺制造的一30栅指(每指尺寸为长L=1μm,宽W=4.76μm)累积型MOS变容管建模中,测量和仿真所得C-V,R-V特性,品质因素以及高达39GHz S参数对比结果验证了模型的良好精度.     

一种基于BSIM-CMG的FinFET变容管模型

提出了一种适用于FinFET变容管的建模方法.在BSIM-CMG的基础上,模型采用衬底模型和外围寄生模型来表征变容管的射频寄生效应.提出了具体的参数提取方法,将测试的S参数导入到安捷伦IC-CAP建模软件提取参数,测试结构引入高频寄生采用(open+ short)去嵌方法进行去嵌.通过调节模型参数拟合测试曲线得到FinFET变容管模型.该模型可精确表述FinFET变容管全工作区域特性,解决传统MOS变容管模型无法准确描述三维FinFET器件变容特性的问题.模型和模型参数提取方法采用20个硅鳍、16个栅指、158 nm栅长、578 nm栅宽的FinFET变容管进行建模验证,模型仿真和测试所得C-V,R-V和S参数特性吻合良好.     

RF-SOI建模:一种精确的体接触RF-LDMOSFET大信号模型

提出一种精确的体接触RF-SOI(radio frequency silicon-on-insulator)LDMOSFET(lateral double diffused MOSFET)大信号等效电路模型.模型漏电流及偏置相关电容模型方程连续、任意阶次可导.发展出一种新的可满足电荷守恒栅源、栅漏电容模型.对漂移区电阻以及LDD(lightly doped drain)区下侧寄生效应偏置相关特性进行了考虑.对自热效应引起的热功率耗散以及跨导/漏导频率分布效应也作了考虑.模型最终应用到-20栅指(每指尺寸为长L=1μm,宽W=50μm)体接触高阻SOI RF-LDMOSFET建模中.测量和仿真所得I-V,S参数,谐波功率特性对比结果验证了模型具有良好的精度.     

RF-SOI建模:一种精确的体接触RF-LDMOSFET大信号模型

提出一种精确的体接触RF-SOI(radio frequency silicon-on-insulator)LDMOSFET(lateral double diffused MOSFET)大信号等效电路模型.模型漏电流及偏置相关电容模型方程连续、任意阶次可导.发展出一种新的可满足电荷守恒栅源、栅漏电容模型.对漂移区电阻以及LDD(lightly doped drain)区下侧寄生效应偏置相关特性进行了考虑.对自热效应引起的热功率耗散以及跨导/漏导频率分布效应也作了考虑.模型最终应用到-20栅指(每指尺寸为长L=1μm,宽W=50μm)体接触高阻SOI RF-LDMOSFET建模中.测量和仿真所得I-V,S参数,谐波功率特性对比结果验证了模型具有良好的精度.     

基于BSIM3模型的毫米波MOS变容管建模

提出了应用于毫米波段的MOS变容管的建模方法。针对标准0.18μm CMOS工艺,采用2D器件仿真软件MINIMOS,设计实现了积累型MOS变容管;并提出和分析了基于标准BSIM3模型的MOS变容管的等效电路模型;通过MINIMOS仿真,直接提取电路模型各寄生参数。该模型能方便地在电路设计软件中实现,并能预测最高达40 GHz频率范围内的变容管特性。     

集成PMOS管变容特性分析与仿真建模

为适应PMOS变容管在集成电路设计中的晶体管级仿真,在分析MOS变容管特性的基础上,通过确定关键点、以曲线拟合的方法建立与工艺参数相关的PMOS集成变容管高频特性模型。选用Charted 0.35μm这个特定的工艺库,并离散地改变电容连接的PMOS静态偏压、用HSpice仿真并对寄生电容提取后描绘出变容特性的准静态曲线;用Matlab对所建的简化高频变容模型进行仿真、得出高频变容曲线。仿真与理论结果相比较表明：PMOS管变容特性曲线与理论曲线的变化趋势吻合;2种仿真对变容显著区吻合较好。从而证明了PMOS集成变容管高频简化模型的正确性。     

一种新型MOS变容管在射频压控振荡器中的应用

基于0.5μm工艺，设计了一个工作频率在1.8GHz，相位噪声在偏移量为500kHz时小于-100dBc/Hz的压控振荡器（VCO）。并将一个普通的压控MOS变容管改进为只工作在反型区的压控MOS变容管。将这两种MOS电容分别应用到该VCO电路中。结果表明，采用反型模式压控MOS变容管的VCO电路具有更大的调谐范围，调谐曲线由之前的反复变化变为单调变化，并且对电路的相位噪声也起到了抑制作用。     

用积累型MOS变容管实现的2.4GHz 0.25μm CMOS全集成压控振荡器

基于TSMC 0.25μm CMOS工艺,将一个普通MOS管改进为工作在积累区的MOS变容管,实现了一工作于2.4GHz的全集成压控振荡器(VCO).测试结果表明,采用积累型MOS变容管的VCO具有较大的调谐范围.在2.5V工作电压下,控制电压从0～2.2V,VCO的频率调节范围为2.210～2.484GHz,在2.4GHz时相位噪声为-105dBc/Hz@600kHz,输出功率为-7.55dBm,电流损耗为7mA.芯片面积约为0.35mm2.     

RF-S01建模：一种精确的体接触RF-LDMOSFET大信号模型

提出一种精确的体接触RF-SOI（radio frequency silicon-on-insulator）LDMOSFET（1ateral double diffusedMOSFET）大信号等效电路模型．模型漏电流及偏置相关电容模型方程连续、任意阶次可导．发展出一种新的可满足电荷守恒栅源、栅漏电容模型．对漂移区电阻以及LDD（1ightly doped drain）区下侧寄生效应偏置相关特性进行了考虑．对自热效应引起的热功率耗散以及跨导／漏导频率分布效应也作了考虑．模型最终应用到一20栅指（每指尺寸为长L=1μm，宽W=50μm）体接触高阻SOIRF-LDMOSFET建模中．测量和仿真所得I-V，S参数，谐波功率特性对比结果验证了模型具有良好的精度．     

MOS管变容特性研究及振荡频率估计

采用软件模拟及仿真的方法,对MOS管变容的特性进行了分析,根据MOS管的变容特性得出一种VCO的频率精确估计方法。仿真实验表明,该方法具有较高的精确度。在电路的设计中可用该方法预测频率,或者提供元件的参考参数从而提高设计效率,降低设计成本。     

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