對於集成電路而言，汽車是一種苛刻的使用環(huán)境，這裡，引擎罩下的工作溫度範圍可寬達 -40°C 至 125°C，而且，在電池電壓總線上出現(xiàn)大瞬變偏移也是預料之中的事
標簽： 集成 電流檢測 保護 汽車系統(tǒng)
上傳時間： 2013-11-20
上傳用戶：zhaiye
在汽車、工業(yè)和電信行業(yè)的設計師當中，使用高功率升壓型轉換器的現(xiàn)像正變得越來越普遍。當需要 300W 或更高的功率時，必須在功率器件中實現(xiàn)高效率 (低功率損耗)，以免除增設龐大散熱器和采用強迫通風冷卻的需要
上傳時間： 2014-12-01
上傳用戶：lhc9102
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.
上傳時間： 2013-10-08
上傳用戶：15071087253
Speed and accuracy don’t always go hand-in-handin DC/DC converter systems—that is, until now. TheLTC3811 is a dual output, fi xed frequency current modeDC/DC switching regulator controller designed for one oftoday’s most demanding power supply applications: highcurrent, low voltage processor core supplies.
上傳時間： 2013-11-21
上傳用戶：aix008
Avalanche photo diode (APD) receiver modules arewidely used in fi ber optic communication systems. AnAPD module contains the APD and a signal conditioningamplifi er, but is not completely self contained. It stillrequires signifi cant support circuitry including a highvoltage, low noise power supply and a precision currentmonitor to indicate the signal strength. The challenge issqueezing this support circuitry into applications withlimited board space. The LT®3482 addresses this challengeby integrating a monolithic DC/DC step-up converter andan accurate current monitor. The LT3482 can supportup to a 90V APD bias voltage, and the current monitorprovides better than 10% accuracy over four decades ofdynamic range (250nA to 2.5mA).
上傳時間： 2014-01-18
上傳用戶：wenyuoo
One of the fi rst lessons in a basic electronics coursecovers the symbols for resistors, capacitors, inductors,voltage sources and current sources. Althougheach symbol represents a functional component of areal-world circuit, only some of the symbols have directphysical counterparts. For instance, the three discretepassive devices—resistors, capacitors, inductors—canbe picked off a shelf and placed on a real board muchas their symbolic analogs appear in a basic schematic.Likewise, while voltage sources have no direct 2-terminalanalog, a voltage source can be easily built with an offthe-shelf linear regulator.
上傳時間： 2013-11-24
上傳用戶：simonpeng
Photomultipliers (PMT), avalanche photodiodes (APD),ultrasonic transducers, capacitance microphones, radiationdetectors and similar devices require high voltage,low current bias. Additionally, the high voltage must bepristinely free of noise; well under a millivolt is a commonrequirement with a few hundred microvolts sometimesnecessary. Normally, switching regulator confi gurationscannot achieve this performance level without employingspecial techniques. One aid to achieving low noise is thatload currents rarely exceed 5mA. This freedom permitsoutput fi ltering methods that are usually impractical
上傳時間： 2013-10-28
上傳用戶：lhw888
當花開完畢時等待按鍵按下即可收花。如真正的花朵開放一模一樣。
上傳時間： 2013-12-23
上傳用戶：hustfanenze
51單片機的10大作品，都不是蓋的，，，，收受益匪淺
標簽： 51單片機
上傳時間： 2013-10-13
上傳用戶：xfbs821
北京，2007年9月27日——全球有線和無線通信半導體市場的領導者Broadcom（博通）公司（Nasdaq：BRCM）今天宣布，推出全球第一個全功能802.11n單芯片解決方案BCM4322。BCM4322是Broadcom Intensi-fiTM產品系列的最新成員，它不僅是市場上最小和最經濟的802.11n解決方案，而且第一個讓Wi-Fi產品的實際無線吞吐量超過了200Mbps。這款最新的Intensi-fi芯片兼有前所未有的無線性能和很多新功能，擴大了無線覆蓋范圍，使無線網絡能夠兌現(xiàn)802.11n的承諾，即同時支持幾路多媒體應用，包括高清視頻流。
上傳時間： 2014-01-14
上傳用戶：haohaoxuexi
