Adobe READER（Acrobat READER）是美國Adobe公司開發(fā)的一款優(yōu)秀的PDF文件閱讀軟件。文檔的撰寫者可以向任何人分發(fā)自己制作（通過Adobe Acobat制作）的PDF文檔而不用擔心被惡意篡改。它可以打開所有PDF文檔，并能與所有PDF文檔進行交互。可查看、搜索、驗證和打印Adobe PDF文件，還可以對其進行數(shù)字簽名以及展開協(xié)作。簡單、明了、便捷。
標簽： 藍牙技術
上傳時間： 2013-07-30
上傳用戶：eeworm
RFID被列為本世紀十大重要技術項目之一，經(jīng)濟部技術處為國內(nèi)科技研發(fā)推動之火車頭，92年度起即開始透過工研院系統(tǒng)中心推動高頻 RFID的研發(fā)計劃，研發(fā)內(nèi)容包括IC芯片、天線、讀取機(READER)等重
標簽： RFID
上傳時間： 2013-08-04
上傳用戶：14786697487
2005年上海市高校學生嵌入式系統(tǒng)創(chuàng)新設計競賽獲獎作品，論文摘要：本文所介紹的小區(qū)停車場智能收費管理系統(tǒng)是基于RFID技術而設計的。整個系統(tǒng)主要由一臺PC機、值班室READER（讀卡器）模塊、小區(qū)入口處READER模塊、小區(qū)出口處READER模塊以及相應的外圍控制電路組成。重點闡述了一種小區(qū)停車場智能收費系統(tǒng)的解決方案，提出了一種受控的RFID標簽的設計方法，設計了 PCB板的 RF天線及大尺寸的銅管天線，同時討論分析了多個READER和PC機聯(lián)機通信的方式。
標簽： RFID 停車場 收費 管理系統(tǒng)
上傳時間： 2013-05-20
上傳用戶：tianyi223
高速數(shù)字系統(tǒng)設計下載pdf:High-Speed Digital SystemDesign—A Handbook ofInterconnect Theory and DesignPracticesStephen H. HallGarrett W. HallJames A. McCallA Wiley-Interscience Publication JOHN WILEY & SONS, INC.New York • Chichester • Weinheim • Brisbane • Singapore • TorontoCopyright © 2000 by John Wiley & Sons, Inc.speeddigital systems at the platform level. The book walks the READER through everyrequired concept, from basic transmission line theory to digital timing analysis, high-speedmeasurement techniques, as well as many other topics. In doing so, a unique balancebetween theory and practical applications is achieved that will allow the READER not only tounderstand the nature of the problem, but also provide practical guidance to the solution.The level of theoretical understanding is such that the READER will be equipped to see beyondthe immediate practical application and solve problems not contained within these pages.Much of the information in this book has not been needed in past digital designs but isabsolutely necessary today. Most of the information covered here is not covered in standardcollege curricula, at least not in its focus on digital design, which is arguably one of the mostsignificant industries in electrical engineering.The focus of this book is on the design of robust high-volume, high-speed digital productssuch as computer systems, with particular attention paid to computer busses. However, thetheory presented is applicable to any high-speed digital system. All of the techniquescovered in this book have been applied in industry to actual digital products that have beensuccessfully produced and sold in high volume.Practicing engineers and graduate and undergraduate students who have completed basicelectromagnetic or microwave design classes are equipped to fully comprehend the theorypresented in this book. At a practical level, however, basic circuit theory is all thebackground required to apply the formulas in this book.
標簽： 高速數(shù)字 系統(tǒng)設計
上傳時間： 2013-10-26
上傳用戶：縹緲
Occasionally, we are tasked with designing circuitry for aspecific purpose. The request may have customer originsor it may be an in-house requirement. Alternately, a circuitmay be developed because its possibility is simply tooattractive to ignore1. Over time, these circuits accumulate,encompassing a wide and useful body of proven capabilities.They also represent substantial effort. These considerationsmake publication an almost obligatory propositionand, as such, a group of circuits is presented here. This isnot the first time we have displayed such wares and, giventhe encouraging READER response, it will not be the last2.Eighteen circuits are included in this latest effort, roughlyarranged in the categories given in this publication’s title.They appear at the next paragraph.
標簽： 信號源 調(diào)節(jié)器 電源 電路分析
上傳時間： 2013-11-12
上傳用戶：012345
This collection of circuits was worked out between June1991 and July of 1994. Most were designed at customerrequest or are derivatives of such efforts. All representsubstantial effort and, as such, are disseminated here forwider study and (hopefully) use.1 The examples areroughly arranged in categories including power conversion,transducer signal conditioning, amplifiers and signalgenerators. As always, READER comment and questionsconcerning variants of the circuits shown may be addresseddirectly to the author.
上傳時間： 2013-11-15
上傳用戶：凌云御清風
This ink marks LTC’s eighth circuit collection publication.1We are continually surprised, to the point of near mystification, by these circuit amalgams seemingly limitlessappeal. READER requests ascend rapidly upon publication,remaining high for years, even decades. All LTC circuitcollections, despite diverse content, share this popularity,although just why remains an open question. Why isit? Perhaps the form; compact, complete, succinct andinsular. Perhaps the freedom of selection without commitment,akin to window shopping.
上傳時間： 2014-01-06
上傳用戶：ligi201200
Designing read/write device (RWD) units for industrial RF-Identification applications is strongly facilitated by the NXP Semiconductors HITAG READER Chip HTRC110. All needed function blocks, like the antenna driver, modulator demodulator and antenna diagnosis unit, are integrated in the HTRC110. Therefore only a minimum number of additional passive components are required for a complete RWD. This Application Note describes how to design an industrial RF-Identification system with the HTRC110. The major focus is dimensioning of the antenna, all other external components including clock and power supply, as well as the demodulation principle and its implementatio
上傳時間： 2013-10-22
上傳用戶：zhengjian
介紹一種簡單射頻識別系統(tǒng)設計。該設計包括閱讀器、應答器和線圈3部分。由單片機控制閱讀器向應答器發(fā)射無線信號，并接收應答器回送的信號，再通過分析回送信號識別物品。閱讀器和應答器之間以半雙工通信方式通信。 Abstract: A simple design of radio frequency identification system is given in this paper.The design includes READER,responder and winding.Through MCU，signals are sent to responder from READER，then corresponding signals are sent back. According to the analysis of the signals sent back，the objects can be identified.Half-duplex communication is adopted? between? READER? and? responder.
上傳時間： 2013-10-11
上傳用戶：plsee
介紹一種采用單片機技術和基站器件EM4095的手持式低頻RFID讀卡器方案。首先對整個系統(tǒng)框架進行說明，然后介紹主要功能模塊的設計，給出了各模塊的原理圖。重點描述了基站器件EM4095的性能參數(shù)和功能原理，最后描述了該系統(tǒng)的主程序流程圖。 Abstract: In this paper,a handheld RFID READER based on MCU and EM4095 is introduced.At first，the configuration of this system is explained.Then the design of main modules and schematic documents are particularly presented.The parameters and principle of the chip EM4095 are introduced in detail. At last，the main software flow is given
上傳時間： 2013-10-18
上傳用戶：windypsm
