DC gain analysis of scaled CMOS op amp in Sub-100 nm technology nodes: A research based on channel length modulation effect

Metal-oxide-semiconductor field effect transistor (MOSFET) intrinsic gain degradation caused by channel length modulation (CLM) effect is examined. A simplified model based on Berkeley short-channel insulator-gate field effect transistor model version 4 (BSIM4) current expression for sub-100 nm MOSFET intrinsic gain is deduced, which only needs a few technology parameters. With this transistor intrinsic gain model, complementary metal-oxide-semiconductor (CMOS) operational amplifier (op amp) DC gain could be predicted. A two-stage folded cascode op amp is used as an example in this work. Non-minimum length device is used to improve the op amp DC gain. An improvement of 20 dB is proved when using doubled channel length design. Optimizing transistor bias condition and using advanced technology with thinner gate dielectric thickness and shallower source/drain junction depth can also increase the op amp DC gain. After these, a full op amp DC gain scaling roadmap is proposed, from 130 nm technology node to 32 nm technology node. Five scaled op amps are built and their DC gains in simulation roll down from 69.6 to 41.1 dB. Simulation shows transistors biased at higher source-drain voltage will have more impact on the op amp DC gain scaling over technology. The prediction based on our simplified gain model agrees with SPICE simulation results.     

教职工健身活动现状调查与对策研究

通过对某校教职工健身活动现状的调查研究,全面了解和掌握教职工健康活动基本状况,提高教职工健身活动的认识程度,达到科学的健身锻炼效果,宣传以健身促健康的绿色健康理念,动员和帮助教职工积极主动地进行健身活动．提高身体素质,更好地为学校的可持续发展提供坚实的人力资源保障。     

阜阳公交便民“触角”30年延伸30倍

改革开放初期,阜阳市仅有17台公交营运车辆,公交线路仅有2条,线路总长不足13公里。到目前,阜阳市公交总公司拥有营运车辆516台,运营线路22条,线路总长达到了386公里。改革开放30年,阜阳公交线路由13公里发展到386公里,公交营运便民“触角”延伸了30倍。     

Interaction between fragile histamine triad and protein kinase C alpha in human non-small cell lung cancer tissues

Objective To investigate the interaction between fragile histamine triad (FHIT) and protein kinase C alpha (PKCα) in human non-small cell lung cancer tissues. Methods FHIT and PKC伪 double positive samples were screened by immunohistochemical staining from 13 human non-small cell lung cancer tissues. Co-immunoprecipitation was performed by using anti-FHIT and anti-PKCα. The immune precipitate was analyzed by SDS-PAGE and Western blot. Results Immune precipitate staining detection showed that 3 samples out of the 13 cases were double positive for FHIT and PKCα. FHIT protein was present in the immune precipitate of anti-PKCα while there was PKCα in the immune precipitate of anti-FHITmAb. Conclusion FHIT and PKCα exist as a complex in human non-small cell lung cancer tissues, which will provide a new route for studying the pathogenesis and immunotherapy of human non-small cell lung cancer.     

灰色系统理论在湖盐线西双桥施工控制中的应用

该文结合工程实际,给出了施工控制体系的组成,运用MIDAS计算得到预拱度的理论计算值,结合施工过程中的实际检测值,以灰色系统的GM(1,1)模型为基础,建立了非常适合大跨径预应力连续梁挂篮施工控制的预测控制系统。成桥后表明,该方法取得了良好的结果。     

沪昆铁路跨线桥55mT梁提移梁高低龙门架及基础设计

上海市A11公路拓宽改建工程沪昆铁路跨线桥主跨为55mT梁,单片55mT梁最重212.3t,梁高3m,上翼缘宽1.7m,上翼缘厚230mm,中间腹板厚200mm,牛腿宽560mm,一跨共6片,与铁路斜交角度为31°。T梁提移梁采用高低龙门吊起吊,由250t架桥机架设。该文介绍了对移喂梁高低龙门架及其基础部分的设计,可供相关专业人员参考。     

上软下硬土层中沉井施工时克服阻沉的对策

该文在剖析了沉井施工下沉力学分析的基础上,针对上软下硬的地基土层的特点,提出了相应的施工对策,特别推荐了选用复式沉井结构形式,采用沉井法与逆作法相结合的施工工艺,并在工程实践中取得了良好的应用,对今后类似工程的施工,具有一定的指导、借鉴作用。     

常州市BRT一号线规划的新理念和新方法

为推进公交优先发展战略的实施,优化交通结构,提高公交对市民出行的吸引力,近年来,国内许多大中城市相继开展了快速公交线路的规划设计和建设运营。该文就常州市在实施快速公交一号线过程中,在规划设计方面采用的新理念和新方法进行分析探讨,希望能为今后类似的工作提供可借鉴的经验。     

环氧沥青混凝土在阳逻大桥钢桥面铺装工程中的应用

武汉阳逻大桥是主跨超过1 000 m的钢箱梁悬索桥,为了保证桥面的使用品质、延长铺装层的使用寿命,其桥面采用了双层环氧沥青混凝土铺装新技术.目前投入使用近2年,铺装层的良好粘结性、优良的高温稳定性和低温抗裂性得到了初步验证.文中介绍了该桥所用的环氧沥青混合料原材料技术标准、矿料的配合比和施工工艺.     

公路纵断面线形安全设计

纵断面设计是公路路线设计的重点,是公路安全设计的核心。纵坡坡度和坡长是公路纵断面线形设计的两项重要控制参数,与交通安全有着密切的关系。在纵坡安全影响分析的基础上,通过研究纵坡坡度、坡长及竖曲线与安全性的关系,从纵断面线形设计角度提出改善公路交通安全的具体措施,可为交通安全设计提供技术支持,预防和减少交通事故。