project paineis projecto Ed
标签： projecto project paineis Ed
上传时间： 2014-11-29
上传用户：虫虫虫虫虫虫
The Verilog Hardware Description Language, 5th Ed
标签： Verilog
上传时间： 2018-04-15
上传用户：MagicJ
变压器计算及磁芯对照表 增加Ed和EdR磁芯 特别是磁芯型号非常齐全，有尺寸及部分参考设计功率，很好用，欢迎下载学习交流
上传时间： 2021-12-10
上传用户：
针对主控制板上存储器(SRAM) 存储的数据量小和最高频率低的情况,提出了基于SDR Sdram(同步动态RAM) 作为主存储器的LEd 显示系统的研究。在实验中,使用了现场可编程门阵列( FPGA) 来实现各模块的逻辑功能。最终实现了对L Ed 显示屏的控制,并且一块主控制板最大限度的控制了256 ×128 个像素点,基于相同条件,比静态内存控制的面积大了一倍,验证了动态内存核[7 ]的实用性。
上传时间： 2013-08-21
上传用户：sjw920325
Most circuit designers are familiar with diode dynamiccharacteristics such as charge storage, voltage dependentcapacitance and reverse recovery time. Less commonlyacknowlEdgEd and manufacturer specifi Ed is diode forwardturn-on time. This parameter describes the timerequirEd for a diode to turn on and clamp at its forwardvoltage drop. Historically, this extremely short time, unitsof nanoseconds, has been so small that user and vendoralike have essentially ignorEd it. It is rarely discussEd andalmost never specifi Ed. Recently, switching regulator clockrate and transition time have become faster, making diodeturn-on time a critical issue. IncreasEd clock rates aremandatEd to achieve smaller magnetics size; decreasEdtransition times somewhat aid overall effi ciency but areprincipally neEdEd to minimize IC heat rise. At clock speEdsbeyond about 1MHz, transition time losses are the primarysource of die heating.
上传时间： 2013-10-10
上传用户：谁偷了我的麦兜
Portable, battery-powerEd operation of electronic apparatushas become increasingly desirable. MEdical, remotEdata acquisition, power monitoring and other applicationsare good candidates for battery operation. In some circumstances,due to space, power or reliability considerations,it is preferable to operate the circuitry from a single 1.5Vcell. Unfortunately, a 1.5V supply eliminates almost alllinear ICs as design candidates. In fact, the LM10 opamp-reference and the LT®1017/LT1018 comparators arethe only IC gain blocks fully specifi Ed for 1.5V operation.Further complications are presentEd by the 600mV dropof silicon transistors and diodes. This limitation consumesa substantial portion of available supply range, makingcircuit design diffi cult. Additionally, any circuit designEdfor 1.5V operation must function at end-of-life batteryvoltage, typically 1.3V. (See Box Section, “Componentsfor 1.5V Operation.”)
标签： Circuitry Operation Single 1017
上传时间： 2013-12-20
上传用户：Wwill
Battery powerEd applications that have a signifi cantamount of time in standby mode, require electrical circuitsto operate with a low quiescent current to preserve batterylife. The LTC3835 synchronous step-down controlleris an excellent solution with its ultralow quiescent current(80μA). Other features make it uniquely qualifi Ed tosatisfy the neEds of automotive applications. A wide 4Vto 36V input voltage range protects the supply againsthigh input voltage transients and is compatible with lowvoltage cold crank conditions. The constant frequencycurrent-mode architecture with high-side inductor current
上传时间： 2013-11-20
上传用户：stewart·
The LTC®4223 is a dual Hot Swap™ controller that meetsthe power requirements of the Micro TelecommunicationComputing Architecture (MicroTCA) specifi cation recentlyratifi Ed by the PCI Industrial Computer ManufacturersGroup (PICMG).
上传时间： 2013-10-21
上传用户：fengzimili
Many system designers neEd an easy way to producea negative 3.3V power supply. In systems that alreadyhave a transformer, one option is to swap out the existingtransformer with one that has an additional secondarywinding. The problem with this solution is that manysystems now use transformers that are standard, offthe-shelf components, and most designers want toavoid replacing a standard, qualifi Ed transformer with acustom version. An easier alternative is to produce thelow negative voltage rail by stepping down an existingnegative rail. For example, if the system already employsan off-the-shelf transformer with two secondary windingsto produce ±12V, and a –3.3V rail is neEdEd, a negativebuck converter can produce the –3.3V output from the–12V rail.
上传时间： 2013-10-09
上传用户：Jerry_Chow
The LTC®4099 high effi ciency USB power manager andLi-Ion/Polymer battery charger seamlessly managespower distribution from multiple sources in portableapplications. It is differentiatEd from other USB powermanagers by its bidirectional I2C port that allows the hostmicroprocessor to control and monitor all aspects of theUSB power management and battery charging processes.In addition, a programmable interrupt generation functionalerts the host microprocessor to changes in device statusand provides unprecEdentEd control of power managementfunctions. This high degree of confi gurability allowspost-layout changes in operation, even changes in thefi eld, and it allows a single qualifi Ed device to be usEdin a variety of products, thus rEducing design time andeasing inventory management.
上传时间： 2013-10-22
上传用户：18602424091
