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  • LabVIEW for Everyone(经典英文书籍)

    The #1 Step-by-Step Guide to labviewNow Completely Updated for labview 8!   Master labview 8 with the industry's friendliest, most intuitive tutorial: labview for Everyone, Third Edition. Top labview experts Jeffrey Travis and Jim Kring teach labview the easy way: through carefully explained, step-by-step examples that give you reusable code for your own projects!   This brand-new Third Edition has been fully revamped and expanded to reflect new features and techniques introduced in labview 8. You'll find two new chapters, plus dozens of new topics, including Project Explorer, AutoTool, XML, event-driven programming, error handling, regular expressions, polymorphic VIs, timed structures, advanced reporting, and much more. Certified labview Developer (CLD) candidates will find callouts linking to key objectives on NI's newest exam, making this book a more valuable study tool than ever. Not just what to d why to do it! Use labview to build your own virtual workbench Master labview's foundations: wiring, creating, editing, and debugging VIs; using controls and indicators; working with data structures; and much more Learn the "art" and best practices of effective labview development NEW: Streamline development with labview Express VIs NEW: Acquire data with NI-DAQmx and the labview DAQmx VIs NEW: Discover design patterns for error handling, control structures, state machines, queued messaging, and more NEW: Create sophisticated user interfaces with tree and tab controls, drag and drop, subpanels, and more Whatever your application, whatever your role, whether you've used labview or not, labview for Everyone, Third Edition is the fastest, easiest way to get the results you're after!

    标签: Everyone LabVIEW for 英文

    上传时间: 2013-10-14

    上传用户:shawvi

  • 中文版《天线理论与设计》R.S.Elliott 著 王茂光等译

    中文版《天线理论与设计》R.S.Elliott 著 王茂光等译

    标签: Elliott 天线

    上传时间: 2013-11-22

    上传用户:zwei41

  • 差分電路中單端及混合模式S-參數的使用

    Single-Ended and Differential S-Parameters Differential circuits have been important incommunication systems for many years. In the past,differential communication circuits operated at lowfrequencies, where they could be designed andanalyzed using lumped-element models andtechniques. With the frequency of operationincreasing beyond 1GHz, and above 1Gbps fordigital communications, this lumped-elementapproach is no longer valid, because the physicalsize of the circuit approaches the size of awavelength.Distributed models and analysis techniques are nowused instead of lumped-element techniques.Scattering parameters, or S-parameters, have beendeveloped for this purpose [1]. These S-parametersare defined for single-ended networks. S-parameterscan be used to describe differential networks, but astrict definition was not developed until Bockelmanand others addressed this issue [2]. Bockelman’swork also included a study on how to adapt single-ended S-parameters for use with differential circuits[2]. This adaptation, called “mixed-mode S-parameters,” addresses differential and common-mode operation, as well as the conversion betweenthe two modes of operation.This application note will explain the use of single-ended and mixed-mode S-parameters, and the basicconcepts of microwave measurement calibration.

    标签: 差分電路 單端 模式

    上传时间: 2014-03-25

    上传用户:yyyyyyyyyy

  • 用二端口S参数来表征差分电路的特性

    用二端口S-参数来表征差分电路的特性■ Sam Belkin差分电路结构因其更好的增益,二阶线性度,突出的抗杂散响应以及抗躁声性能而越来越多地被人们采用。这种电路结构通常需要一个与单端电路相连接的界面,而这个界面常常是采用“巴伦”器件(Balun),这种巴伦器件提供了平衡结构-到-不平衡结构的转换功能。要通过直接测量的方式来表征平衡电路特性的话,通常需要使用昂贵的四端口矢量网络分析仪。射频应用工程师还需要确定幅值和相位的不平衡是如何影响差分电路性能的。遗憾的是,在射频技术文献中,很难找到一种能表征电路特性以及衡量不平衡结构所产生影响的好的评估方法。这篇文章的目的就是要帮助射频应用工程师们通过使用常规的单端二端口矢量网络分析仪来准确可靠地解决作为他们日常工作的差分电路特性的测量问题。本文介绍了一些用来表征差分电路特性的实用和有效的方法, 特别是差分电压,共模抑制(CMRR),插入损耗以及基于二端口S-参数的差分阻抗。差分和共模信号在差分电路中有两种主要的信号类型:差分模式或差分电压Vdiff 和共模电压Vcm(见图2)。它们各自的定义如下[1]:• 差分信号是施加在平衡的3 端子系统中未接地的两个端子之上的• 共模信号是相等地施加在平衡放大器或其它差分器件的未接地的端子之上。

    标签: 二端口 S参数 差分电路

    上传时间: 2013-10-14

    上传用户:叶山豪

  • S参数的设计与应用

    Agilent AN 154 S-Parameter Design Application Note S参数的设计与应用 The need for new high-frequency, solid-state circuitdesign techniques has been recognized both by microwaveengineers and circuit designers. These engineersare being asked to design solid state circuitsthat will operate at higher and higher frequencies.The development of microwave transistors andAgilent Technologies’ network analysis instrumentationsystems that permit complete network characterizationin the microwave frequency rangehave greatly assisted these engineers in their work.The Agilent Microwave Division’s lab staff hasdeveloped a high frequency circuit design seminarto assist their counterparts in R&D labs throughoutthe world. This seminar has been presentedin a number of locations in the United States andEurope.From the experience gained in presenting this originalseminar, we have developed a four-part videotape, S-Parameter Design Seminar. While the technologyof high frequency circuit design is everchanging, the concepts upon which this technologyhas been built are relatively invariant.The content of the S-Parameter Design Seminar isas follows:

    标签: S参数

    上传时间: 2013-12-19

    上传用户:aa54

  • s参数计算/s参数计算器

    s参数计算器,S11,S12,S22,S21的参数,一算变知,非常方便。

    标签: 参数计算 参数 计算器

    上传时间: 2013-11-20

    上传用户:432234

  • PLUS CPU卡片升级方案

    对于如何从MIFARE Classic卡片升级到PLUS CPU 卡片在“MIFARE S50、S70升级PLUS CPU卡方案”文档中已有详细说明,那么原来使用的PLUS CPU卡片如何进行升级了?带着这个问题,我们将与您共同探讨,后面的内容将向您提供一种完美、可靠、易用的解决方案,谢谢您的关注与支持!

    标签: PLUS CPU 卡片 方案

    上传时间: 2014-12-30

    上传用户:VRMMO

  • PLUS CPU卡片简介

    MIFARE Plus在当前主流非接触式智能卡应用的基础上提供更高的安全性,并且可轻易升级现有卡片的安全级别。在升级到新的安全级别之前,MIFARE Plus是唯一兼容MIFARE4K(MF1ICS70),MIFARE 1K(MF1ICS50)和MIFARE Mini(MF1ICS20)的主流智能卡。安全性升级后,MIFARE Plus使用AES(高级加密标准)进行认证,数据完整性和数据加密操作。MIFARE Plus的空中接口和加密方式是基于安全级别最高的全球开放式标准,。

    标签: PLUS CPU 卡片

    上传时间: 2013-12-22

    上传用户:banyou

  • 基于LPCEB2000-S的SPI程序

    基于LPCEB2000-S的SPI程序

    标签: LPCEB 2000 SPI 程序

    上传时间: 2013-11-11

    上传用户:540750247

  • 基于LPCEB2000-S的串口程序

    串口通迅测试,当收到8个以上字符时就将收到的字符再发送出去,波特率为9600。基于LPCEB2000-S的串口程序

    标签: LPCEB 2000 串口程序

    上传时间: 2013-11-04

    上传用户:dvfeng