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  • power pcb To protel 軟件

    power pcb To protel 軟件

    標簽: protel power pcb To

    上傳時間: 2013-09-11

    上傳用戶:sunshine1402

  • Can convert data file(txt format)to CAD(scr)file,and draw curve!

    Can convert data file(txt format)to CAD(scr)file,and draw curve!

    標簽: file convert format curve

    上傳時間: 2013-09-11

    上傳用戶:天空說我在

  • gerber-to-protel is a pdf file

    gerber-to-protel is a pdf file ,which is used for convert bmp to pcb.

    標簽: gerber-to-protel file is

    上傳時間: 2013-09-18

    上傳用戶:liuxinyu2016

  • 電臺維修模擬訓練系統設計方法研究

    Methods for designing a maintenance simulation training system for certain kind of radio are introduced. Fault modeling method is used to establish the fault database. The system sets up some typical failures, follow the prompts trainers can locate the fault source and confirm the type to accomplish corresponding fault maintenance training. A training evaluation means is given to examining and evaluating the training performance. The system intuitively and vividly shows the fault maintenance process, it can not only be used in teaching, but also in daily maintenance training to efficiently improve the maintenance operation level. Graphical programming language LabVIEW is used to develop the system platform.

    標簽: 電臺維修 模擬訓練 方法研究 系統設計

    上傳時間: 2013-11-19

    上傳用戶:3294322651

  • 射頻集成電路設計John Rogers(Radio Freq

    Radio Frequency Integrated Circuit Design I enjoyed reading this book for a number of reasons. One reason is that itaddresses high-speed analog design in the context of microwave issues. This isan advanced-level book, which should follow courses in basic circuits andtransmission lines. Most analog integrated circuit designers in the past workedon applications at low enough frequency that microwave issues did not arise.As a consequence, they were adept at lumped parameter circuits and often notcomfortable with circuits where waves travel in space. However, in order todesign radio frequency (RF) communications integrated circuits (IC) in thegigahertz range, one must deal with transmission lines at chip interfaces andwhere interconnections on chip are far apart. Also, impedance matching isaddressed, which is a topic that arises most often in microwave circuits. In mycareer, there has been a gap in comprehension between analog low-frequencydesigners and microwave designers. Often, similar issues were dealt with in twodifferent languages. Although this book is more firmly based in lumped-elementanalog circuit design, it is nice to see that microwave knowledge is brought inwhere necessary.Too many analog circuit books in the past have concentrated first on thecircuit side rather than on basic theory behind their application in communications.The circuits usually used have evolved through experience, without asatisfying intellectual theme in describing them. Why a given circuit works bestcan be subtle, and often these circuits are chosen only through experience. Forthis reason, I am happy that the book begins first with topics that require anintellectual approach—noise, linearity and filtering, and technology issues. Iam particularly happy with how linearity is introduced (power series). In therest of the book it is then shown, with specific circuits and numerical examples,how linearity and noise issues arise.

    標簽: Rogers Radio John Freq

    上傳時間: 2014-12-23

    上傳用戶:han_zh

  • R7732_3_5 AC TO DC PWM Control chip

    R7732_7733_7735是Richpower公司推出的高效AC TO DC 電源PWM控制芯片,最大功率可以做到75W;如有需求請聯系我電話:021-54262182EXT 114 (Eric) QQ :1187337351

    標簽: Control 7732 chip PWM

    上傳時間: 2013-11-20

    上傳用戶:xz85592677

  • 電源供應器與數字電位器校準應用筆記

    Abstract: A resistive feedback network is often used to set the output voltage of a power supply. A mechanical potentiometer (pot)conveniently solves the problem of adjusting a power supply. For easier automatic calibration, a mechanical pot can be replaced witha digital pot. This application note presents a calibration solution that uses a digital pot, because digipots are smaller, do not movewith age or vibration, and can be recalibrated remotely. This proposed solution reduces the susceptibility of the system to thetolerance of the digital pot's end-to-end resistance, making the solution optimal fordesigners. This application note also explainssome of the equations required to calculate the resistor chain values and to use a digital pot in this way. A spreadsheet withstandard reisistor values is available for easy calculations.

    標簽: 電源供應器 數字電位器 應用筆記 校準

    上傳時間: 2013-10-31

    上傳用戶:caiguoqing

  • 長電c2383 TO-92L

    長電c2383 TO-92L

    標簽: c2383 TO 92

    上傳時間: 2013-11-09

    上傳用戶:wvbxj

  • 100-15V TO 12V DCDC 原理圖 PCB BOM表

    高的工作電壓高達100V N雙N溝道MOSFET同步驅動 The D810DCDC is a synchronous step-down switching regulator controller that can directly step-down voltages from up to 100V, making it ideal for telecom and automotive applications. The D810DCDC uses a constant on-time valley current control architecture to deliver very low duty cycles with accurate cycle-by-cycle current limit, without requiring a sense resistor. A precise internal reference provides 0.5% DC accuracy. A high bandwidth (25MHz) error amplifi er provides very fast line and load transient response. Large 1Ω gate drivers allow the D810DCDC to drive multiple MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN and can also be synchronized to an external clock for switching-noise sensitive applications. Integrated bias control generates gate drive power from the input supply during start-up and when an output shortcircuit occurs, with the addition of a small external SOT23 MOSFET. When in regulation, power is derived from the output for higher effi ciency.

    標簽: DCDC 100 12V BOM

    上傳時間: 2013-10-24

    上傳用戶:wd450412225

  • DN428微型同步升壓轉換器

      Alkaline batteries are convenient because they’re easy tofi nd and relatively inexpensive, making them the powersource of choice for portable instruments and devicesused for outdoor recreation. Their long shelf life alsomakes them an excellent choice for emergency equipmentthat may see infrequent use but must be ready to go on amoment’s notice. It is important that the DC/DC convertersin portable devices operate over the widest possiblebattery voltage range to extend battery run time, and thussave the user from frequent battery replacement.

    標簽: 428 DN 同步升壓 轉換器

    上傳時間: 2014-12-24

    上傳用戶:569342831

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