施工质量与上行噪声关系的探讨

良好的施工质量才能保证网络高质量的双向传输,分析HFC网络上行信道的噪声来源,提出控制用户噪声、规范布线、线缆接头处理、接地防雷的正确方法,以提高施工质量,合理布局网络结构则要注意设备指标的一致、设备基本电平的配值、分配系统的反向衰减要大致相同,以防止噪声的侵入.     

电子设备的布线技术

详细讨论了电子设备的布线技术，包括导线的主要参数、导线的特性、导线的种类和主要的布线技术，其目的在于提高电子设备的电磁兼容能力。     

航空电子系统数字电子设备的噪声抑制

在航空电子系统中的数字式电子设备内部噪声的主要原因是数字电路的开关特性和导线有电感。抑制数字电路噪声的一个重要途径是减小导线电感。设计线路板时,要合理布局,布线,减小地线和电源线的电感,减小电流环路面积,使噪声和辐射减至最小。     

电子设备的布线技术

详细讨论了电子设备的布线技术 ,包括导线的主要参数、导线的特性、导线的种类和主要的布线技术 ,其目的在于提高电子设备的电磁兼容能力     

柔性线路板串扰PSpice仿真分析及应用

通过场仿真器获得柔性线路板三导线传输线系统电感电容矩阵,进而得到传输线PSpice模型,并对实际的静电放电干扰进行模拟,从改变实际产品布线结构的角度减小相邻线路脉冲干扰对器件自身的串扰噪声损伤,有利于产品前期的设计改进。     

玻璃基板激光微细熔覆柔性布线技术研究

与传统的布线技术相比，激光微细熔覆柔性布线技术可以提高线路板制备的效率并降低生产成本。对基于玻璃基板的激光微细熔覆柔性布线技术的工艺进行了重点研究，分析了激光功率密度和扫描速度对导体厚度和宽度的影响规律，同时研究了烧结时间对导体电阻率和结合强度的影响趋势。试验表明，激光功率密度和扫描速度对导线的厚度影响不大，而对导线的宽度有着重要的影响。导线宽度随功率密度增加、扫描速度减小而增加，并都存在临界值；随着烧结时间延长，导线电阻率减小，结合强度提高。在此基础上，探讨了导体附着机理和导电机理。     

多芯片组件布线算法研究

该文以多芯片组件布线中的四通孔(V4R)算法为基础,针对其布线结果不均匀、产生多余噪声的缺陷,通过引入PST(Priority Search Tree)和LEA(Left Edge Algorithm)方法,移除过孔或拐角,减小布线层数,减少噪声,以达到总体布线结果优化。计算机模拟结果表明,优化后的算法有效利用了布线空间,在电特性方面使延时和噪声均得到减小。     

温度与线缆性能的关系

阐述了网络布线性能评判指标——信道带宽的基本知识，分析影响带宽的主要噪声来源为近端串扰和衰减串扰比。进而通过TIA5类线缆标准和TIA6类线缆标准的比较，分析影响带宽的因素，通过对温度效应的阐述，明晰了温度对布线系统线缆性能的影响，最后提倡使用低衰减的布线系统。     

CATV系统中噪声的分析及对策（6）

12 住宅布线中的噪声问题 12.1 宅内布线方式 前面一直在介绍在干线等传输通道中的汇合噪声问题,但本讲将介绍有关宅内布线的问题。 在日本的住宅中约有60％是单户建设的住宅,约40％是集体居民楼住宅。根据这一情况相对于共同接收设备而存在着各种布线方式。     

Belden CDT推出防侵入式连接器

Belden CDT网络部近日宣布推出新的防侵入式Optimax LC现场安装光纤连接器家族。此防侵入式Optimax LC连接器属于Belden IBDN FiberExpress光纤布线解决方案的一部分，是对最近推出的FiberExpress防侵入式LC系统的一个重要的补充。对于要求整系统防侵入，并且可在现场可靠地安装光纤布线系统．Optimax LC连接器家族将满足其需要。     

The future of wires

Concern about the performance of wires wires in scaled technologies has led to research exploring other communication methods. This paper examines wire and gate delays as technologies migrate from 0.18-μm to 0.035-μm feature sizes to better understand the magnitude of the the wiring problem. Wires that shorten in length as technologies scale have delays that either track gate delays or grow slowly relative to gate delays. This result is good news since these “local” wires dominate chip wiring. Despite this scaling of local wire performance, computer-aided design (CAD) tools must still become move sophisticated in dealing with these wires. Under scaling, the total number of wires grows exponentially, so CAD tools will need to handle an ever-growing percentage of all the wires in order to keep designer workloads constant. Global wires present a more serious problem to designers. These are wires that do not scale in length since they communicate signals across the chip. The delay of these wives will remain constant if repeaters are used meaning that relative to gate delays, their delays scale upwards. These increased delays for global communication will drive architectures toward modular designs with explicit global latency mechanisms     

基于PL3106的室内调光控制系统

针对室内布线不方便以及噪声干扰小的特点,设计了一种基于低压电力线载波通信芯片PL3106的室内调光控制系统。该系统以电力线为信息传输媒介,设计简单,节约成本。其关键要解决的电网噪声对通信的影响,从而延长通信距离。以PL3106为核心搭建了电力线载波通信的硬件电路,采用通信协议实现一对多通信,从而由总控制器控制多个照明节点。测试结果表明,该系统在400 m内通信稳定,能准确实现照明调光,取得了良好效果。     

Effect of barrier-layer deposition conditions on reliability of on-chip wiring

An experimental investigation is carried out to evaluate the reliability of on-chip aluminum wiring in relation to the conditions of barrier-layer deposition, with the barrier material being polycrystalline or amorphous silicon produced by pyrolyzing silane. The highest values of electromigration activation energy in the conductor are achieved with hydrogenated amorphous silicon, deposited at a suitably reduced temperature. For wiring patterns lying on a complex topography, the influence of steps on the electrical performance of wires is found to be the main factor in wiring reliability.     

Integrated wiring system for construction equipment

Advances in electronic technology have brought numerous changes in design of most types of construction equipment. Due to the electronic devices and electric loads, such as lamps and motors, a typical construction vehicle has many wires and connectors. The next phase of the changes is to focus on how to reduce these complex wires by using digital communications. This paper presents the development of an integrated wiring system for construction equipment. More specifically, an excavator that has more than 40 devices has been chosen in order to apply the concept of the integrated wiring system. After grouping electrical devices by their locations and functions, two communication controllers, i.e., an instrument controller and an engine-hydraulic controller, are defined. Two test controllers have been developed in order to prove the concept     

Prelayout interconnect yield prediction

Functional yield is a term used to describe the percentage of dies on a wafer that are not affected by catastrophic defects. Within the interconnect these defects are usually caused by particle contamination and are divided into bridging defects, which join adjacent wires and cuts, which result in broken wires. Functional yield is therefore determined by the geometry of the routing channels, how these channels are filled with wire and the distribution of defect sizes. Since the wire spacing and width are usually fixed and the distribution of defects within a mature production facility is well known, the problem reduces to estimating individual wire lengths for cuts and to estimating the overlapping distance that two wires share in neighboring sections of the routing grid for bridges. Previous work in this area has analyzed the problem by assuming that all wiring tracks are occupied with wire, leading to overestimates for the probability of failure due to both cuts and bridges. This paper utilizes statistical models of the placement/routing process to provide a more realistic approach for cut and bridge yield estimation. A comparison of the predicted probability of failure within each wiring layer with postlayout data indicate an average error of 20% for cuts and 26% for bridges.     

Analysis of the trade-offs between conventional and superconductinginterconnections

The performance tradeoffs for conventional and superconducting interconnections in applications ranging from printed wiring boards to chips are examined. For most semiconductor device-based applications, the potential gains in wiring density offered by superconductors appear to be more important than the bandwidth improvements. The analysis determines the values of critical current density above which superconductors outperform conventional wires in systems of various physical sizes. This identifies particular interconnection technologies for which high-temperature superconductors show the most promise     

IETM接线数据元素的设计与应用

IETM是装备技术数据的载体,是装备保障信息化建设的一个重要方面。分析了接线类数据模块信息表述的顶层结构设计和几个关键性元素的组织结构设计,给出了接线信息表述的几个应用实例,从一个侧面阐明了制作接线类数据模块需要把握的难点问题,可为IETM研制人员提供参考。     

基于0.35μm SiGe BiCMOS的高纯度频率综合器

介绍了一个基于0.35μm SiGe BiCMOS的整数N频率综合器.通过采用不同工艺来实现不同模块,实现了一个具有良好的杂散和相噪性能的高纯度频率综合器.除环路滤波器外所有的部件均采用差分电路结构.为了进一步减小相位噪声,压控振荡器中采用绑定线来形成谐振.该频率综合器可在2.39～2.72 GHz的频率范围内输出功率OdBm.在100kHz频偏处测得的相位噪声为-95dBc/Hz,在1MHz频偏处测得的相位噪声为-116dBc/Hz.参考频率处杂散小于-72dBc.在3V 的工作电压下,包括输出驱动级在内的整个芯片消耗60mA电流.     

Replacing Copper Wires with Carbon Nanotube Wires in Electrical Transformers

Carbon nanotubes, with their unique physical properties, have the potential to outperform conventionally used electrical wiring metals. Any improvement in this area of technology would be of great importance to industry, the economy, and the environment, as the global need for electrical energy and its efficient transfer and conversion rapidly increases. Carbon nanotube fibers, which are assemblies made purely of carbon nanotubes, can uniquely be used in macroscopic electrical applications including electrical wires and devices where the operation is enabled by these conductors. This paper presents details of the working prototype of an electrical machine, a transformer, where conventional copper wires have been replaced with conducting wires made purely of carbon nanotube fibers.     

Frequency-domain reflectometry for on-board testing of aging aircraft wiring

Aging aircraft wiring poses a significant safety threat and has been implicated in losses of both military and commercial aircraft. This paper describes the conceptual design and function of a "smart wiring system" based on a low-cost frequency-domain reflectometer (FDR) that can be used to test the integrity of aircraft cables nondestructively on board. This system will enable the pilot or maintainer to test all critical wiring systems prior to flight at the push of a button. The details and test results from the FDR system on realistic aircraft wires are described. The system has a bandwidth of 0.8-1.2 GHz, a range of 4.5 m, and a resolution of 3 cm and can determine the length and terminating impedance of a cable harnesses from measurements at a single end. The system is now being miniaturized to be imbedded in a "connector saver" format for aftermarket installation on common existing platforms.