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
TCS ECN Background & Key TermsTrust Issues with PCIe PlatformsTCS ECN DetailsTrusted Config Space and TCS TransactionsTrusted Config Access Mech (TCAM)Standard vs Trusted Config AccessNew Capability StructuresTCS Support in Root Ports, Switches, & BridgesTCS “Does not…” ListExample Trusted Computing PlatformRevisiting the Trust IssuesKey Takeaways/Call to ActionQuestions
标签： Configuration Trusted PCIe Spa
上传时间： 2013-11-21
上传用户：hsfei8
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.
上传时间： 2014-12-23
上传用户：han_zh
enter——选取或启动 esc——放弃或取消 f1——启动在线帮助窗口 tab——启动浮动图件的属性窗口 pgup——放大窗口显示比例 pgdn——缩小窗口显示比例 end——刷新屏幕 del——删除点取的元件（1个） ctrl+del——删除选取的元件（2个或2个以上） x+a——取消所有被选取图件的选取状态 x——将浮动图件左右翻转 y——将浮动图件上下翻转 space——将浮动图件旋转90度 crtl+ins——将选取图件复制到编辑区里 shift+ins——将剪贴板里的图件贴到编辑区里 shift+del——将选取图件剪切放入剪贴板里 alt+backspace——恢复前一次的操作 ctrl+backspace——取消前一次的恢复 crtl+g——跳转到指定的位置 crtl+f——寻找指定的文字
上传时间： 2013-12-29
上传用户：13033095779
收文单位：左列各单位 发文字号： MT-8-2-0037
上传时间： 2013-12-17
上传用户：123312
The LTC®3414 offers a compact and efficient voltage regulatorsolution for point of load conversion in electronicsystems that require low output voltages (down to 0.8V)from a 2.5V to 5V power bus. Internal power MOSFETswitches, with only 67mW on-resistance, allow theLTC3414 to deliver up to 4A of output current with efficiencyas high as 94%. The LTC3414 saves space by operatingwith switching frequencies as high as 4MHz, enabling theuse of tiny inductors and capacitors.
上传时间： 2014-01-03
上传用户：dongbaobao
Multiple-voltage electronics systems often requirecomplex supply voltage tracking or sequencing, whichif not met, can result in system faults or even permanentfailures in the fi eld. The design diffi culties in meetingthese requirements are often compounded in distributedpowerarchitectures where point-of-load (POL) DC/DCconverters or linear regulators are scattered across PCboard space, sometimes on different board planes. Theproblem is that power supply circuitry is often the lastcircuitry to be designed into the board, and it must beshoehorned into whatever little board real estate is left.Often, a simple, drop-in, fl exible solution is needed tomeet these requirements.
上传时间： 2013-10-08
上传用户：15071087253
DC/DC 升压IC：The FP6291 is a current mode boost DC-DC converter. Its PWM circuitry with built-in 0.25 Ω power MOSFET make this regulator highly power efficient. The internal compensation network also minimizes as much as 6 external component counts. The non-inverting input of error amplifier connects to a 0.6V precision reference voltage and internal soft-start function can reduce the inrush current. The FP6291 is available in the SOT23-6L package and provides space-saving PCB for the application fields.
上传时间： 2013-11-07
上传用户：3294322651
As the performance of many handheld devices approachesthat of laptop computers, design complexity also increases.Chief among them is thermal management—how doyou meet increasing performance demands while keepinga compact and small product cool in the user’s hand?For instance, as battery capacities inevitably increase,charge currents will also increase to maintain or improvetheir charge times. Traditional linear regulator-based batterychargers will not be able to meet the charge currentand effi ciency demands necessary to allow a product torun cool. What is needed is a switching-based chargerthat takes just about the same amount of space as a linearsolution—but without the heat.
上传时间： 2013-11-23
上传用户：lu2767
The power appetite of large TFT-LCDs appears to beinsatiable. Power supplies must feed increasing numbersof transistors and improved display resolutions, and doso without taking much space.
上传时间： 2014-12-24
上传用户：小小小熊
