High input impedance and a wide input range are twohighly desirable features in a precision analog-to-digitalconverter, and the LTC®2449 delta-sigma ADC has both.With just a few external components, the LTC2449 formsan exceptional measurement system with very high inputimpedance and an input range that extends 300mV beyondthe supply rails.
上傳時(shí)間： 2013-11-02
上傳用戶：ywcftc277
Many thermal metrics exist for integrated circuit (IC) packages ranging from θja to Ψjt.Often, these thermal metrics are misapplied by customers who try to use them to estimate junction temperatures in their systems.
上傳時(shí)間： 2013-10-18
上傳用戶：貓愛薛定諤
PLC 控制系統(tǒng)最初被應(yīng)用于對(duì)離散量的控制,隨著技術(shù)的發(fā)展和實(shí)際工程應(yīng)用的需求,PLC 控制系統(tǒng)也開始用于對(duì)連續(xù)變量的控制。結(jié)合實(shí)際工程,對(duì)PID 模塊指令在Allen2Bradley 公司的PLC 產(chǎn)品中的應(yīng)用,進(jìn) 行闡述說明。
上傳時(shí)間： 2013-10-18
上傳用戶：小寶愛考拉
Digital-to-analog converters (DACs) are prevalent inindustrial control and automated test applications.General-purpose automated test equipment often requiresmany channels of precisely controlled voltagesthat span several voltage ranges. The LTC2704 is ahighly integrated 16-bit, 4-channel DAC for high-endapplications. It has a wide range of features designed toincrease performance and simplify design.
上傳時(shí)間： 2013-11-22
上傳用戶：元宵漢堡包
PID由于用途廣泛、使用靈活，已有系列化產(chǎn)品，使用中只需設(shè)定三個(gè)參數(shù)(Kp， Ti和Td)即可。在很多情況下，并不一定需要全部三個(gè)單元，可以取其中的一到兩個(gè)單元，但比例控制單元是必不可少的。
標(biāo)簽： PID PLC 溫度控制 程序設(shè)計(jì)
上傳時(shí)間： 2013-11-21
上傳用戶：gxrui1991
Designers of signal receiver systems often need to performcascaded chain analysis of system performancefrom the antenna all the way to the ADC. Noise is a criticalparameter in the chain analysis because it limits theoverall sensitivity of the receiver. An application’s noiserequirement has a signifi cant infl uence on the systemtopology, since the choice of topology strives to optimizethe overall signal-to-noise ratio, dynamic range andseveral other parameters. One problem in noise calculationsis translating between the various units used by thecomponents in the chain: namely the RF, IF/baseband,and digital (ADC) sections of the circuit.
標(biāo)簽： 數(shù)字接收器 信號(hào)鏈 噪聲分析
上傳時(shí)間： 2014-12-05
上傳用戶：cylnpy
PID(比例-積分-微分)控制器作為最早實(shí)用化的控制器已有70多年歷史，現(xiàn)在仍然是應(yīng)用最廣泛的工業(yè)控制器。PID控制器簡(jiǎn)單易懂，使用中不需精確的系統(tǒng)模型等先決條件，因而成為應(yīng)用最為廣泛的控制器。
上傳時(shí)間： 2013-11-24
上傳用戶：haohao
The 14-bit LTC2351-14 is a 1.5Msps, low power SARADC with six simultaneously sampled differential inputchannels. It operates from a single 3V supply and featuressix independent sample-and-hold amplifi ers and a singleADC. The single ADC with multiple S/HAs enables excellentrange match (1mV) between channels and channel-tochannelskew (200ps).
上傳時(shí)間： 2014-12-23
上傳用戶：天誠(chéng)24
本文中所討論的功能塊（SFB41/FB41，SFB42/FB42，SFB43/FB43）僅僅是使用于S7 和C7 的CPU 中的循環(huán)中斷程序中。該功能塊，定期計(jì)算所需要的數(shù)據(jù)，保存在指定的DB 中（背景數(shù)據(jù)塊）。允許多次調(diào)用該功能塊.
上傳時(shí)間： 2013-10-13
上傳用戶：wdq1111
A fully differential amplifi er is often used to converta single-ended signal to a differential signal, a designwhich requires three signifi cant considerations: theimpedance of the single-ended source must match thesingle-ended impedance of the differential amplifi er,the amplifi er’s inputs must remain within the commonmode voltage limits and the input signal must be levelshifted to a signal that is centered at the desired outputcommon mode voltage.
上傳時(shí)間： 2013-11-09
上傳用戶：wweqas
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