面向21世纪的高技术芯片

1 “绿色”计算机芯片　 2 防制伪芯片　 3 人造视网膜芯片　 4 微型探测器芯片　 5 视觉神经网膜芯片　 6 快速微处理器芯片　 7 大容量铁电ＲＡＭ芯片　 8 可置入人脑的芯片　 9 类似人脑细胞的芯片1 0 碳化硅芯片1 1 智能型芯片1 2 量子芯片1 3 超小型移动电话芯片1 4 能无限期存储数据的芯片1 5 高集成度芯片1 6 集成度最高的芯片1 7 冷却型芯片1 8 含有有机物的芯片1 9 瞬间记忆芯片2 0 新型节能芯片2 1 网络过滤芯片2 2 手持式电脑芯片2 3 新型语音芯片2 4 多媒体芯片2 5 “默斯特”芯片2 6 新一代芯片　　据报道 ,美国…     

市场要闻

2013年移动芯片销售将首超PC芯片市场研究公司IC Insights近日发布最新研究报告指出,明年移动芯片销售额将首次超过PC芯片。台式电脑不断下滑的销售使得移动芯片销售在芯片销售市场上占据了主导地位。IC Insights把PC芯片销售分类为台式电脑芯片、笔记本电脑芯片、跨界产品芯片以及如Chromebook这样的瘦客户机风格系统芯片的销售。     

介电电泳芯片的结构设计与模拟分析进展

综述了国内外微流控芯片介电电泳(DEP)的研究进展和介电电泳芯片的主要结构设计方案。依据芯片电极结构设计的不同,将介电电泳芯片分为阵列电极DEP芯片、抛物线电极DEP芯片、绝缘微柱DEP芯片及其他设计DEP芯片四大类。分别对芯片电极结构设计所采用的模拟分析进行了归纳和综述,重点探讨了如何通过电场模拟分析手段对芯片结构参数进行优化,分析了流体分布与热效应对芯片效能的影响,列举了不同电极结构设计的DEP芯片的工作效率及实际应用效果。提出了目前采用模拟分析方法进行芯片结构设计存在的问题,进而对基于MEMS技术的DEP芯片的设计和应用前景进行了展望。     

芯片技术与计算机

芯片技术与计算机是密不可分的。先进的微电子技术制造出先进的芯片,而先进的计算机则是由先进的芯片组成的。芯片是微电子技术的结晶,是计算机的核心。随着芯片集成度的上升,开始了从单功能芯片向多功能芯片,也就是系统芯片的转变。当一块芯片就是一个系统的时候,设...     

虽有家财万贯 不如金卡傍身(四)——IC卡制造工艺、数据加密及其读写设备

<正> (续上篇)上篇介绍了IC卡芯片结构,本文继续对IC卡的制造工艺以及数据加密措施作一简要介绍,供读者参考。 IC卡芯片类型 IC卡芯片分为通用芯片和专用芯片两大类。通用芯片因其开发简单、价格便宜,比较适合对安全性要求不高的IC卡应用。而专用芯片是专为IC卡而设计、制造的芯片。这种芯片符合目前IC卡的ISO国际标准,具有较高的安全性。IC卡所使用的专用芯片,又分为存储器芯片和微处理器芯片两大类。存储卡使用存储器芯片作为卡芯;智能卡则使用微处理器芯片作为卡芯。IC卡经常使用的存储器芯片种类及特征见表1。     

医用微流控芯片研究进展

随着微电子学和微机电系统技术不断发展,微流控芯片技术不断创新,一些具有颠覆意义的新型医用芯片不断出现,并成为现代医学技术的支撑工具。首先,概述了医用微流控芯片的概念和应用。然后,介绍了6种具有代表性的新型医用微流控芯片的研究进展,包括基因芯片、即时诊断芯片、免疫芯片、可穿戴式芯片、数字化聚合酶链式反应芯片、循环肿瘤细胞芯片、组织与器官仿生芯片。最后,总结了医用微流控芯片的发展趋势。     

基于IIC协议的计算机对芯片的控制

IIC协议广泛应用于计算机与芯片、芯片与芯片的通信中,通过芯片的IIC接口,计算机可以监测、控制芯片工作状况,本文分析了IIC总线及其协议规范,并设计了计算机与芯片IIC通信的接口电路,对实现计算机与芯片通信很有意义。     

飞利浦推出革命性电源管理芯片 特为台式PC机电源设计的高级拓扑技术 可大幅提高的电源效率超过80％

飞利浦电子公司日前发布了绿色芯片(GreenChip)节能系列的两款最新产品:绿色芯片(GreenChip)PC芯片组和绿色芯片(GreenChip)SR芯片组。飞利浦绿色芯片(Greenchip)PC芯片组采用了一种全新的一体式(all-in-one)设计,可以大幅提高台式PC机电源整体效率超过 80％。绿色芯片(Greenchip)SR(同步整     

通讯专用芯片设计综述

分析了国际上通讯专用芯片设计的发展趋势,探讨了国内通讯专用芯片设计的现状,文章认为,基于通讯芯片设计的国际国背景,以通讯专用芯片为突破口,发展芯片设计技术,是我国芯片设计行业的适宜选择。     

面源红外目标模拟器硬件系统设计

面源红外目标模拟器是红外成像导弹导引头性能测试必不可少的部件。通过需求分析,利用PCI技术、FPGA芯片、SRAM芯片和DA芯片搭建了一个硬件驱动系统,用来实现驱动电阻阵列芯片的产生红外辐射的功能,同时对系统中的PCI接口芯片、FPGA芯片、SRAM芯片、DA转换芯片和电阻阵列芯片的选型进行了详细分析,并且对硬件系统涉及的FPGA外围电路、PCI接口电路、SRAM接口电路和DA转换电路进行了设计。     

基于2007-2013年COSMIC掩星数据的电离层振幅闪烁研究

利用2007-2013年的COSMIC掩星数据，分析了E区与F区电离层闪烁的变化特征.发现用闪烁出现频次、闪烁发生率以及闪烁强度来表征的电离层闪烁出现规律比较相似.E区电离层闪烁在夏季半球的中纬地区最强，其次是春秋季的低纬地区和冬季半球.就经度分布来说，春秋季E区电离层闪烁呈四波结构.对F区电离层闪烁来说:南美-大西洋扇区在12月至点最为显著；非洲和太平洋扇区在6月至点最为显著；大西洋扇区在春秋分季最为显著.极区也出现中等强度的闪烁，尤其在南半球的90°E~180°E扇区较为显著.高纬E区电离层闪烁强度随太阳活动的增强而增强，而低纬和南半球的中纬E区闪烁随太阳活动的增强而减弱.高纬和低纬F区闪烁随太阳活动的增强而增强，而中纬F区电离层闪烁对太阳活动无显著依赖关系.对于赤道区来说，北半球60°W~60°E经度区闪烁强度随太阳活动的变化最为显著，其次是南半球60°E~210°E附近；而对于高纬地区来说，F区闪烁强度随太阳活动的变化最为显著的区域在南半球60°E~210°E附近.     

Fourth quarter 2009 IEEE communications surveys and tutorials

Welcome to the fourth issue of 2009 of the IEEE Communications Surveys and Tutorials. Paper in this issue survey the research effort in several areas such mobility in Wimax, mobility models in VANET, handoff in cellular networks, admission control in MANETS, physical impairments in optical networks, physical layer issues in the 802.11n standard as well as jamming in wireless sensor networks     

Inventive payoff from R&D in Japanese industry: convergencewith the West

An attempt is made to determine if investment in R&D and the hiring of college-educated employees result in a higher rate of inventions. The relationship between the input of R&D and inventive output is studied in two samples of Japanese factories, 34 in 1982 and 44 in 1970. These results are compared with findings in a parallel American study. The correlations between R&D and inventive output are similar in Japan and America in the 1980s, despite some differences in the management of innovation in the two nations. Moreover, the most Westernized subsample of Japanese firms in the 1970s had correlations between R&D and invention similar to those observed in the American study. Thus, it is concluded that some degree of convergence may be taking place in R&D management strategies in the two nations     

Effect of photovoltage on current flow in metal-semiconductor schottky-barrier contacts

It is shown that changes in device characteristics and an increase in the light-to-electrical energy conversion efficiency in metal-semiconductor Schottky barrier contacts are associated with a peripheral electric field built into the contact. For contacts with longer perimeters, variations in device characteristics and the light-to-electrical energy conversion efficiency are significantly larger. Since the photovoltage and peripheral electric fields in the contact region are codirected with the intrinsic electric field of the space-charge region, contact illumination results in a larger increase in the “dead” zone in forward portions of current-voltage characteristics, a larger decrease in the effective Schottky barrier height, and an increase in the field electron emission. An increase in the reverse field emission under photovoltage leads to an increase in the recombination current in the space-charge region, which provides dc photocurrent flow in the circuit.     

开放体系下云母表面纳米气泡的制备与观察

固/液界面纳米气泡的存在已经得到证实,并成为界面科学研究的一个焦点.在原子力显微镜液体池内制备纳米气泡的基础上,本研究建立了在开放体系中进行醇水替换,制备纳米气泡的方法.原子力显微镜观察显示.开放体系中进行醇水替换,也可以在水/云母界面上稳定地生成纳米气泡.将不同环境下制备的纳米气泡进行比较,统计结果显示,在开放体系下制备的纳米气泡密度较低,形态也较小.不同环境下醇水替换产生的纳米气泡数量和形态的差异,为纳米气泡形成的机制提供了新的佐证.开放体系下纳米气泡制备方法的建立拓展了纳米气泡的制备条件,揭示了纳米气泡存在的普遍性,同时也为纳米气泡性质研究提供了新的途径.     

Improved LUT Technique for HPA Nonlinear Pre-Distortion in OFDM Systems

In this paper, we focus on the Look-up Table (LUT) technique for the compensation of HPA nonlinear distortion. An improved LUT method is proposed with better performance compared with conventional LUT technique in terms of convergence speeds, BER and total degradation (TD). It can get over 8 dB gain in out-of-band spectrum re-growth suppression and about 0.3 dB BER performance gain than conventional LUT technique with the same iteration times. Also, we propose an actual application of HPA with pre-distorter in OFDM transmitter. Ai Bo was born in Shannxi Province in China on February 7, 1974. He received a BSc. Degree from Engineering Institute of Armed Police Force in 1997, a Master and Dr. degree from Xidian University in 2002 and 2004 in China respectively, and now working as a post dr. in Dept. of E&E, state of key lab. on microwave and digital communications in Tsinghua University in China. He has once participated in the key research project on HDTV in TEEG (Team of Engineering Expert Group) of China. He is an editorial committee member of journal of “Computer Simulations”, “Information and Electronic Engineering”, an IEEE member and a senior member of Electronics Institute of China (CIE). He has published over 60 scientific papers in his research area till now. His current interests are the research and applications of OFDM techniques with emphasis on synchronization and HPA linearization techniques. Yang Zhi-Xing graduated from Tsinghua University, P.R. China in 1970. He is now a Professor and Deputy Director of State Key Lab. on Microwave and Digital Communication at the Department of Electronic Engineering and the Director of the DTV R&D Center in Tsinghua University. As a DTV technical expert for the Chinese government, Professor Yang has also been a member of the DTV standardization Committee of China and a leader of the DTV Standardization Harmonizing Group in Ministry of Information Industry of China. His major research interests include broadband information transmission technologies and DTV broadcasting systems. Pan Chang-Yong received the B.S. and M.S. degrees from the Department of Electronic Engineering in Tsinghua University, P.R. China, in 1996 and 1999, respectively. He is now an associate professor in the Department of Electronic Engineering and a member of the DTV R&D Center in Tsinghua University. His research interests are in the areas of broadband wireless transmission systems and satellite communications. Zhang Tao-Tao was born in Shandong Province in China in 1982, he received BSc. degree from Tsinghua University in 2004 and now pursing his Master degree in Dept. of E&E, state of key lab. on microwave and digital communications in Tsinghua University in China. His research interests is the power amplifier linearization techniques. Wang Yong was born in Shannxi Province in China in 1976. He received a BSc., a Master and a Dr. Degree from Xidian University in China in 1997, 2002 and 2005, respectively, and now is an associate professor in Xidian University. He has once participated in the key research project on HDTV in TEEG (Team of Engineering Expert Group) in China and is an IEEE Member. His interests are broadband multimedia communications. Ge Jian-Hua was born in September, 1961 in JiangSu Province in China. He received the B.Sc., Master and Ph.D. degree from Xidian University in 1982, 1985 and 1989, respectively. He is now the professor in both Xidian University in Xi’an and Shanghai Jiaotong University in Shanghai. He is the senior member of Chinese Electronics Institute. He has won lots of scientific and technical prizes in China and published many papers. His interests are transmission communications and web security.     

A Strategy for Broad-Band Network Introduction in Italy

Studies are being carried out in Italy concerning the strategy for the introduction in the 1990's of optical fiber systems in the distribution network, in order to supply customers with broad-band services (in particular with video services). This paper deals with some of the main choices that are being done, in particular in view of a field trial which is planned in Rome in 1988.     

Changes in hemoglobin and ferritin biosynthesis in leukemias detected by M?ssbauer spectroscopy

The primary results of the study of hemoglobin and ferritin in erythrocytes in leukemia are considered in the light of the M?ssbauer spectroscopy data. The quantitative changes in hemoglobin and ferritin during differentiation of cells in the Friend erythroleukemia are shown. The qualitative changes in iron electronic structure of oxyhemoglobin in different forms of human leukemias are shown.     

Photovoltaics in architecture in The Netherlands: an architect's view

The Netherlands has a programme for the integration of photovoltaic (PV) modules in the built environment. The aim of this programme is to realize 250 MWp in PV systems by the year 2010. Within this programme the integration of PV modules in architecture has an important role, presenting opportunities for architects. New Technology and materials are an invitation for new design. BEAR Architecten is involved in several low-energy, bio-climatic building projects, amongst them are a few PV projects: De Kleine Aarde, an Environmental Education Centre with transparent PV panels in the glass roof; roof retrofit with PV modules in five houses in Leiden; facade integration with PV shading in 22 houses in Dordrecht; roof integration in row houses in Enschede; roof integration in a utility building in Geldermalsen. Information about these projects is given, but also the possibilities and the problems are discussed here. A general conclusion is that custom-made modules are often necessary to make well-designed buildings.     

微孔无铜原因分析与改善

文章主要分析了PCB制造过程中微孔出现孔无铜的各类原因以及改善预防措施,并且详细介绍了对于火山灰堵孔造成的微孔孔无铜的原因分析。