基于通用开关盒的FPGA互连结构低功耗设计

为了降低FPGA互连结构的功耗,针对目前FPGA普遍采用的通用互连结构,提出了快速结构评估框架—FDPAef,建立了功耗延时积的逐级优化步骤.在新型的通用开关盒互连结构（GSB）基础上,使用该评估框架对各种结构参数进行评估和优化,得到一种低功耗的GSB结构.经过MCNC基准电路测试实验表明,相比传统的CB/SB互连结构,优化得到的GSB结构能够使FPGA功耗延时积下降9.9%,面积下降10.7%.     

模/数混合集成电路中的数字开关噪声分析

本文分析了静态CMOS逻辑开关在模/数混合集成电路中的开关特性、噪声特性和功耗及功耗延迟积等性能的影响,并用电流控制逻辑结构代替静态CMOS逻辑,实现低电压工作性能和峰值噪声电流下降.     

模/ 数混合集成电路中的数字开关噪声分析

本文分析了静态CMOS逻辑开关在模 数混合集成电路中的开关特性、噪声特性、功耗及功耗延迟积等对其性能的影响 ,并提出用电流控制逻辑结构代替静态CMOS逻辑 ,实现低电压工作性能和峰值噪声电流下降     

一种高频低功耗ECL逻辑到CMOS逻辑转换电路

采用NPN、PNP两种类型的双极晶体管以及反馈技术,设计了一种高频、低功耗ECL到CMOS逻辑的转换电路.HSPICE模拟结果表明：电路最高工作频率可以达到2.5 GHz,转换延迟不超过120 ps,功耗小于15 mW.     

一种低功耗GaN基紫外焦平面读出电路设计

针对GaN基紫外焦平面,采用单端放大器的CTIA结构作为输入级,设计了一种小面积低功耗的读出电路,分析了电路的电荷增益、注入效率、功耗与噪声等性能指标。通过使用边积分边读出模式工作,电路功耗显著下降,当面阵大小为M×N时,仅与列数N有关。仿真结果表明,电路工作正常,电荷增益为1.6μV/e,注入效率可达96.8%,输出线性度大于99%,对噪声具有很好的抑制作用。     

基于RTL级的数字电路功耗分析

研究从RTL级分析数字电路的功耗。应用信息论中熵的概念计算由VHDL描述中抽象出的电路模型的功耗,并考虑输出之间的相关。分别对单输出和多输出情况进行了分析,最后得到一个考虑相关的近似功耗估算公式,将熵与电路功耗结合起来能够比较精确地估算电路功耗。     

高速芯片封装结构的同步开关噪声分析及抑制

基于IBIS模型,提出了一种新颖、简单地估算高速芯片封装结构同步开关噪声（SSN）的方法,通过与电路模拟方法的比较,表明了该方法的有效性,基于对多种抑制封装结构SSN措施的分析与讨论,给出了低SSN的高速封装结构设计原则。     

2-2 MASH结构改进及其FPGA实现

针对多级噪声整形(Multi-stage Noise Shaping, MASH)结构的量化噪声问题,提出一种在传统MASH结构基础上改进的4阶两级MASH结构.首先分析传统MASH结构的原理,指出在输入信号延时处理上的不足,进而给出改进的MASH结构及理论分析.利用Altera公司的Stratix Ⅳ系列FPGA采用自顶向下的方法构建二阶单环调制器模拟部分、噪声抵消单元数字部分和数据处理部分等主要模块实现本文的MASH结构.仿真表明,改进的MASH结构较传统结构减少67%的延时,噪声整形性能比改进前提升9.7%,进一步降低量化噪声的影响.     

神经信号再生专用微电子系统的设计

根据神经束电信号的特点,提出一种适用于中枢神经束电信号探测放大和再激励的微电子系统设计方案,功能单元包括微弱神经电信号探测电路、交流信号耦合电路和神经束再激励电路.为面向生物体植入应用,系统设计主要考虑功耗、噪声和交流耦合输入等性能.另外,设计了2种运算放大器单元,分别是用于前置电路的低噪声、低功耗两级运算放大器和具有高增益、高驱动能力的输入输出全摆幅恒跨导折叠运算放大器.系统采用CSMC双层多晶硅双层金属(DP-DM)标准0.5μm CMOS工艺设计完成.仿真和测试结果表明设计芯片实现了微弱低频电信号放大功能,可用于神经信号再生应用,功耗和体积满足生物体植入式器件的要求.     

用电流控制逻辑降低模/数混合集成电路的噪声

本文分析了静态CMOS逻辑开关在模/数混合集成电路中的开关特性,噪声特性和功耗及功耗延迟等性能的影响,并用电流控制逻辑结构代替静态CMOS逻辑,实现低电压工作性能和峰值噪声电流下降近三个数量级     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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