业界观察

smilywu

不错,顶一下！感谢楼主！

winworm

Designcon 2009刚刚落下帷幕，精彩不容错过，快来聆听一下大师观点：

http://www.realtimewith.com/pages/videos.cgi?&rtwsid=17

Eric还当起了Designcon的采访记者。

winworm

改天有时间了再跟大家侃侃仪表，高速连接器。

winworm

ADS 2009:信号完整性设计工具的盛宴

Signal Integrity
• Channel Simulator
• GPU Accelerated Transient Simulator
• New, fast eye diagram measurements
• Djordjevic loss model for fast, causal multilayer models
• Causality-corrected microstrip and stripline models
• Threaded impulse characterization for faster convolution

Simulation
• Support HSPICE .pat statement
• Arbitrary Jitter Analysis
• Multi-threaded harmonic balance
• Improved Passive Circuit Design Guide
• Wireless Libraries (WiMedia v1.2, 3GPP/LTE MIMO v8.3.0 & v8.4.0)
• Pole-zero custom frequency-dependent voltage and current sources

EMDS G2 full 3DEM
• 3D parameterized components
• Improved mesher and solver
• Fast frequency sweep for iterative solver
• Symmetry planes

Momentum G2 Planar 3DEM
• Improved meshing
• Improved resistance modeling
• Port re-sequence for easy S-Parameter interpretation
• Substrate stack driven viewing utilities
• Enhancements to Broadband Spice Model Generator for passivity and causality

Physical Layout
• DRC for Flattened Layout
• DRC 3rd-party integration (Assura, Calibre, MailDRC)
• PDK Builder for Schematic
• Enhanced layout and SMT connectivity transfer from Allegro PCB, APD and SIP

Usability
• AEL Debugger for ADS customization
• Data Display snap-to-grid alignment
• New 50 ADS examples
• Direct drawing of pass-fail limit lines on plots
• Fast variable setup tab for statistics and DOE simulation

winworm

国内翻译的书真是不能看。

电磁兼容导论（机工版）闻映红等译，第七章223页最后一段关于双边谱与单边谱的的幅度关系翻译如下：

注意：在双边带幅度谱中除了直流分量以外的所有正频率分量是单边带幅度谱的2倍。

而英文原文是：

Note that all positive frequency components except the dc component in the two-sided magnitude spectrum
are doubled to give the one-sided magnitude spectrum.

中文翻译恰好把2倍的关系弄反了，得到一个完全错误的结论，不知道是闻映红老师的哪个学生粗心给翻译的，唉！

winworm

不知道哪位有人邮版的《电磁兼容导论》第二版，帮我看看对应的这段翻译，看看是不是一错再错。如果真是这样，这样的翻译质量真是害人不浅！

intercourse

顶一下

zhouyingxaut

顶下再说

winworm

风雨飘摇中的SUN

SUN已经陷入亏损、股票缩水和增长停滞的灰色旋涡。在网络和电信大发展和泡沫破灭的整个过程中，SUN可谓受益和受害最多，高科技公司中几乎无出其右者。在过去的几年中，SUN的股票缩水75%，是IBM的二倍还多，尽管从2002年的数据看来，Sun仍然是 UNIX的领军人物，但相对于竞争对手，SUN的景况更让人担忧：作为SUN安身立命的根本--服务器，不仅在低端面临DELL的残酷进攻，而且高端又被 IBM抢占了风头，而高低通吃的惠普，则更让SUN坐卧立不宁。至于Wintel联盟，根本一直就是SUN的心腹大患。
　　
而最要命的是，SUN在办公软件、Linux终端等方面频频拓展，从CPU到操作系统到存储到工作站等等，SUN 四面出击，不仅胜算多少还很难说，这无异四面树敌。SUN面对18年以来最严重的销售衰退。

10年前，SUN的PI设计是业界做得最好的，到现在已经物是人非，昔日做PI的人相继流失：
首先是Larry Smith去了Altera，然后是Raymond Anderson去了Xilinx，现在Istvan Novak也要开始单干：

Welcome to the Electrical Integrity webpage.  These webpages are maintained as a service to the professional signal and power integrity engineering community.  Feel free to browse these pages; all links on the left, except the last one, are accessible without any restriction or registration.  The content is split between signal and power integrity, as also illustrated by the logos to the left and right of the title.  The two logos are fancy-looking colorful graphs, but they are actually relevant to signal and power integrity.  If you are curious about the technical meaning of the logos, click on them to view brief explanations.

http://www.electrical-integrity.com/Istvan%20Novak%27s%20Electrical%20Integrity%20Home%20Page.html

ding3211

IBM最近不是要宣布收购SUN？