Altium Designer Winter09 最新PCB库，也是最全的。
上传时间： 2013-10-26
上传用户：zxc23456789
培训资料
标签： com-Protel elecfans Designer Altium
上传时间： 2013-11-05
上传用户：nanshan
Altium Designer下的封装库，整个库都是项目的积累，所有元件都通过项目测试，可靠快捷。此刻上传，奉献给大家，希望能不让更多的人受益。。。
上传时间： 2013-11-12
上传用户：tfyt
在Protel2004中进行PCB的完备的CAM输出。首先，我们可以输出的gerber文件， 操作如下：1：画好PCB后，在PCB 的文件环境中，左键点击File\Fabrication Outputs\Gerber Files,进入Gerber setup 界面
上传时间： 2013-10-14
上传用户：aeiouetla
Abstract: We don't expect manufacturers to produce clothes that in one size that fits everyone. In thesame way, one ESD component can't solve all issues—each application has different ESD requirements.Knowing that "one size fits all" cannot apply to power design, the power designer, or the engineering"super hero," must consider all the potential disruptions to a steady flow of power and thenvarious waysto mitigate them. This tutorial describes voltage- and current-limiting devices and risetime reducers tomanage the power. It also points to free and low-cost software tools to help design lowpass filters, checkcapacitor self-resonance, and simulate circuits.
上传时间： 2013-11-18
上传用户：zhouxuepeng1
针对TI公司最新发布的TMS320C6678 DSP设计出一种实用有效的电源。采用统一的12 V电源供电，制作出满足电压幅值要求与时序要求的开关电源。该设计主要由各类电源转换电路组成，并通过使用Fusion Digital Power Designer软件对电源芯片进行编程。仿真结果表明，该电源工作稳定，各方面的参数均符合要求。
上传时间： 2013-10-12
上传用户：asdstation
The makers of handheld medical, industrial and consumerdevices use a wide variety of high resolution, small tomedium sized color TFT LCD displays. The power supplydesigners for these displays must contend with shrinkingboard area, tight schedules, and variations in displaytypes and feature requirements. The LTC®3524 simplifi esthe designer’s job by combining a versatile, easily programmed,TFT LCD bias supply and white LED backlightdriver in a low profi le 4mm × 4mm QFN package.
上传时间： 2013-10-26
上传用户：chens000
In a recent discussion with a system designer, the requirementfor his power supply was to regulate 1.5Vand deliver up to 40A of current to a load that consistedof four FPGAs. This is up to 60W of power that must bedelivered in a small area with the lowest height profi lepossible to allow a steady fl ow of air for cooling. Thepower supply had to be surface mountable and operateat high enough effi ciency to minimize heat dissipation.He also demanded the simplest possible solution so histime could be dedicated to the more complex tasks. Asidefrom precise electrical performance, this solution had toremovethe heat generated during DC to DC conversionquickly so that the circuit and the ICs in the vicinity do notoverheat. Such a solution requires an innovative designto meet these criteria:
上传时间： 2013-11-24
上传用户：defghi010
As logic systems get larger and more complex, theirsupply current requirements continue to rise. Systemsrequiring 100A are fairly common. A high current powersupply to meet such requirements usually requires parallelingseveral power regulators to alleviate the thermalstress on the individual power components. A powersupply designer is left with the choice of how to drive theseparalleled regulators: brute-force single-phase or smartPolyPhaseTM.
上传时间： 2013-10-08
上传用户：zhqzal1014
When a system designer specifies a nonisolated dc/dc powermodule, considering the needed input voltage range isequally as important as considering the required performanceattributes and features. Generally, nonisolated moduleshave either a narrow or a wide input voltage range. Narrowinputmodules typically have a nominal input voltage of3.3, 5, or 12 V. For systems that operate from a tightlyregulated input bus—such as those that do not use batterybackup—a narrow-input module is often adequate sincethe input remains fairly stable.Offering greater flexibility, wide-input modules operatewithin a range of 7 to 36 V, which includes the popular12- or 24-V industrial bus. This enables a single module tobe used for generating multiple voltages. These modulesare ideal for industrial controls, HVAC systems, vehicles,medical instrumentation, and other applications that usea loosely regulated distribution bus. In addition, systemspowered by a rectifier/battery charger with lead-acidbattery backup almost always require wide-input modules.System designers who choose power supplies may wantto take a close look at the latest generation of wide-inputdc/dc modules.
标签： Wide-input modules offer dc
上传时间： 2014-12-24
上传用户：dragonhaixm
