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  • This file is used for the comparison of of groups within livejournal groups and finding how many sim

    This file is used for the comparison of of groups within livejournal groups and finding how many similar people exist within two specified groups.

    標(biāo)簽: groups livejournal comparison finding

    上傳時(shí)間: 2014-01-11

    上傳用戶:ainimao

  • online sales system of texttile mill was a project within which there was great opportunity for Lear

    online sales system of texttile mill was a project within which there was great opportunity for Learning about Internet and E-commerce. As current era is the era of Communication, and Internet is becoming the vital source of communication and Information. Online sale system of fabrics is the requirement of evey texttile mill Associated (put) Lahore. Considering these reasons this project was developed.

    標(biāo)簽: opportunity was texttile project

    上傳時(shí)間: 2017-07-08

    上傳用戶:busterman

  • self learning VC++ within a week

    self learning VC++ within a week

    標(biāo)簽: learning within self week

    上傳時(shí)間: 2014-01-27

    上傳用戶:wxhwjf

  • computed distribution of the magnetic field Hz within an wvolving 2D dielectric mircopille with ini

    computed distribution of the magnetic field Hz within an wvolving 2D dielectric mircopille with initial r=667nm run in COMSOL with Matlab

    標(biāo)簽: distribution dielectric mircopille computed

    上傳時(shí)間: 2013-12-09

    上傳用戶:zaizaibang

  • 雙絞線和低通濾波器降低EMI_RFI

    Abstract: Alexander Graham Bell patented twisted pair wires in 1881. We still use them today because they work so well. In addition we have the advantage ofincredible computer power within our world. Circuit simulators and filter design programs are available for little or no cost. We combine the twisted pair and lowpassfilters to produce spectacular rejection of radio frequency interference (RFI) and electromagnetic interference (EMI). We also illustrate use of a precision resistorarray to produce a customizable differential amplifier. The precision resistors set the gain and common mode rejection ratios, while we choose the frequencyresponse.

    標(biāo)簽: EMI_RFI 雙絞線 低通濾波器

    上傳時(shí)間: 2014-11-26

    上傳用戶:Vici

  • DN454 單端至差分放大器設(shè)計(jì)技巧

      A fully differential amplifi er is often used to converta single-ended signal to a differential signal, a designwhich requires three signifi cant considerations: theimpedance of the single-ended source must match thesingle-ended impedance of the differential amplifi er,the amplifi er’s inputs must remain within the commonmode voltage limits and the input signal must be levelshifted to a signal that is centered at the desired outputcommon mode voltage.

    標(biāo)簽: 454 DN 單端 差分放大器

    上傳時(shí)間: 2013-11-09

    上傳用戶:wweqas

  • T2060_T2170打印頭安裝步驟

    Submission must be made within 10 days after the printhead upgrade.Failure to do so will void the 12-month warranty by TallyGenicom.

    標(biāo)簽: 2060 2170 打印頭

    上傳時(shí)間: 2013-11-22

    上傳用戶:DXM35

  • 高速數(shù)字系統(tǒng)設(shè)計(jì)下載pdf

    高速數(shù)字系統(tǒng)設(shè)計(jì)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(biāo)簽: 高速數(shù)字 系統(tǒng)設(shè)計(jì)

    上傳時(shí)間: 2013-10-26

    上傳用戶:縹緲

  • 計(jì)算FR4上的差分阻抗(PDF)

    Calculation of the Differential Impedance of Tracks on FR4 substrates There is a discrepancy between calculated and measured values of impedance for differential transmission lineson FR4. This is especially noticeable in the case of surface microstrip configurations. The anomaly is shown tobe due to the nature of the substrate material. This needs to be considered as a layered structure of epoxy resinand glass fibre. Calculations, using Boundary Element field methods, show that the distribution of the electricfield within this layered structure determines the apparent dielectric constant and therefore affects theimpedance. Thus FR4 cannot be considered to be uniform dielectric when calculating differential impedance.

    標(biāo)簽: FR4 計(jì)算 差分阻抗

    上傳時(shí)間: 2014-12-24

    上傳用戶:DE2542

  • 降壓升壓型控制器簡(jiǎn)化手持式產(chǎn)品的DC/DC轉(zhuǎn)換器設(shè)計(jì)

      A number of conventional solutions have been available forthe design of a DC/DC converter where the output voltageis within the input voltage range—a common scenarioin Li-Ion battery-powered applications—but none werevery attractive until now. Conventional topologies, suchas SEPIC or boost followed by buck, have numerousdisadvantages, including low effi ciency, complex magnetics,polarity inversion and/or circuit complexity/cost. TheLTC®3785 buck-boost controller yields a simple, effi cient,low parts-count, single-converter solution that is easyto implement, thus avoiding the drawbacks associatedwith traditional solutions.

    標(biāo)簽: DC 降壓 升壓型 控制器

    上傳時(shí)間: 2013-10-21

    上傳用戶:ljt101007

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