Pockels光纤传感器在电力工业中的新应用

本文通过Pockels光纤传感器原理构成和真空灭弧室等效电路的分析,计论了一种利用多通道于Pockels光纤传感监测系统监测高压大电流真空开闭设备中灭弧窒真空度的新方法。     

CMOS模拟开关的导通与截止特性

本文对CMOS模拟开关漏电流、导通电阻、电阻偏差,分布电容及外接负载等对模拟信号传输的影响进行了比较深入的分析,提出了改进开关性能的途径。     

Enhanced fluorescence of remote functionalized diaminodicyanoquinodimethanes in the solid state and fluorescence switching in a doped polymer by solvent vapors

Remote functionalized zwitterionic diaminodicyanoquinodimethanes are found to exhibit a dramatic enhancement of light emission in the solid state and when doped in polymer films, as compared to the solution state. Crystal structure analysis of prototypical molecules reveals the role of the remote functionality in the solid state molecular organization. Semiempirical quantum chemical computations provide a viable model to explain the interesting phenomenon of fluorescence enhancement as arising from the inhibition of geometry relaxation of the vertical excited state to a nonemitting state. The reversible switching of a doped polymer film fluorescence triggered by solvent vapors is demonstrated.     

Sleep switch dual threshold voltage domino logic with reduced subthreshold and gate oxide leakage current

A circuit technique is proposed in this paper for simultaneously reducing the subthreshold and gate oxide leakage power consumption in domino logic circuits. PMOS-only sleep transistors and a dual threshold voltage CMOS technology are utilized to place an idle domino logic circuit into a low leakage state. Sleep transistors are added to the dynamic nodes in order to reduce the subthreshold leakage current by strongly turning off all of the high threshold voltage transistors. Similarly, the sleep switches added to the output nodes suppress the voltages across the gate insulating layers of the transistors in the fan-out gates, thereby minimizing the gate tunneling current. The proposed circuit technique lowers the total leakage power by 88 to 97% as compared to the standard dual threshold voltage domino logic circuits. Similarly, a 22 to 44% reduction in the total leakage power is observed as compared to a previously published sleep switch scheme in a 45 nm CMOS technology.     

光敏开关及其在化学生物学中的应用*

近年来随着生物医学技术的发展,人们需要越来越细致地在分子水平上研究各种生命过程。为了能够实现实时原位地观察活细胞或组织中的生命化学过程,需要使用以物理方法来选择性激活的分子探针。以共聚焦激光技术为基础的光敏开关能很好地解决这一问题。迄今,发展和用于光敏开关的光敏剂已成为化学生物学研究的重要方向。本文重点总结了各种可应用于共聚焦激光系统的单、双光子光敏基团（单光子的光敏基团主要有：硝基苯类、香豆素类等;双光子光敏基团主要有：香豆素类、喹啉类及吲哚衍生物类）以及这几类光敏基团在化学生物学中的应用。     

基于基本对称函数产生器的模拟开关实现

开关－信号理论与传统的电路设计理论不同,它不是以门电路或其它集成块为基本单元,而是以开关元件为构造单元,本文应用形状－信号理论指导二变量基本对函数产处理品在及双向对称模拟开关的设计,并提出了基于双向对称模拟开关的对称函数的电路实现。     

10 GHz增益开关激光器输出脉冲的三级压缩实验研究

通过理论分析,数值模拟和实验,研究了10GHz增益开关半导体激光器输出脉冲的几种压缩技术,提出了一种新型的三级压缩技术,包括1）正色散光纤补偿;2）正色散光纤加负色散光纤的脉冲压缩;3）梳状色散光纤压缩,实验上得到脉冲宽度为2.8ps的压缩脉冲,总的压缩比为9。此压缩技术对实验80Gb/s光时分复用（OTDM）系统具有重要意义。     

Spatial solitons in nonlinear liquid waveguides

Spatial solitons are studied in a planar waveguide filled with nonlinear liquids. Spectral and spatial measurements for different geometries and input power of the laser beam show the influence of different nonlinear effects as stimulated scatterings on the soliton propagation and in particular on the beam polarization. The stimulated scattering can be used advantageously to couple the two polarization components. This effect can lead to multiple applications in optical switching.     

5LA--36GT型延长放大器电调谐网路的原理分析

有线电视全电视信号经过两级放大前放和后放.前放输出的信号增益较高,高低端电平相差较大,应进行衰减和均衡,使后放的输入信号达到要求.本文介绍延长放大器中的电子衰减和电子均衡的电路原理和工作原理.此电路是现今有线电视放大器中应用最广泛的电路.     

A Study of MPLS Hybrid Switch Based on ATM Switch

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