Control systems are becoming increasingly dependent on digital processing and so require sensors able to provide direct digital inputs. Sensors based on time measurement, having outputs based on a frequency or phase, have an advantage over conventional analogue sensors in that their outputs can be measured directly in digital systems by pulse counting.
上傳時間： 2013-10-08
上傳用戶：wuyuying
Highlights the LTC1062 as a lowpass filter in a phase lock loop. Describes how the loop's bandwidth can be increased and the VCO output jitter reduced when the LTC1062 is the loop filter. Compares it with a passive RC loop filter. Also discussed is the use of LTC1062 as simple bandpass and bandstop filter.
上傳時間： 2013-10-24
上傳用戶：chens000
模擬集成電路的設(shè)計與其說是一門技術(shù)，還不如說是一門藝術(shù)。它比數(shù)字集成電路設(shè)計需要更嚴格的分析和更豐富的直覺。嚴謹堅實的理論無疑是嚴格分析能力的基石，而設(shè)計者的實踐經(jīng)驗無疑是誕生豐富直覺的源泉。這也正足初學(xué)者對學(xué)習(xí)模擬集成電路設(shè)計感到困惑并難以駕馭的根本原因。.美國加州大學(xué)洛杉機分校(UCLA)Razavi教授憑借著他在美國多所著名大學(xué)執(zhí)教多年的豐富教學(xué)經(jīng)驗和在世界知名頂級公司(AT&T，Bell Lab，HP)卓著的研究經(jīng)歷為我們提供了這本優(yōu)秀的教材。本書自2000午出版以來得到了國內(nèi)外讀者的好評和青睞，被許多國際知名大學(xué)選為教科書。同時，由于原著者在世界知名頂級公司的豐富研究經(jīng)歷，使本書也非常適合作為CMOS模擬集成電路設(shè)計或相關(guān)領(lǐng)域的研究人員和工程技術(shù)人員的參考書。... 本書介紹模擬CMOS集成電路的分析與設(shè)計。從直觀和嚴密的角度闡述了各種模擬電路的基本原理和概念，同時還闡述了在SOC中模擬電路設(shè)計遇到的新問題及電路技術(shù)的新發(fā)展。本書由淺入深，理論與實際結(jié)合，提供了大量現(xiàn)代工業(yè)中的設(shè)計實例。全書共18章。前10章介紹各種基本模塊和運放及其頻率響應(yīng)和噪聲。第11章至第13章介紹帶隙基準、開關(guān)電容電路以及電路的非線性和失配的影響，第14、15章介紹振蕩器和鎖相環(huán)。第16章至18章介紹MOS器件的高階效應(yīng)及其模型、CMOS制造工藝和混合信號電路的版圖與封裝。 1 Introduction to Analog Design 2 Basic MOS Device Physics 3 Single-Stage Amplifiers 4 Differential Amplifiers 5 Passive and Active Current Mirrors 6 Frequency Response of Amplifiers 7 Noise 8 Feedback 9 Operational Amplifiers 10 Stability and Frequency Compensation 11 Bandgap References 12 Introduction to Switched-Capacitor Circuits 13 Nonlinearity and Mismatch 14 Oscillators 15 Phase-Locked Loops 16 Short-Channel Effects and Device Models 17 CMOS Processing Technology 18 Layout and Packaging
上傳時間： 2014-12-23
上傳用戶：杜瑩12345
本文提出用級聯(lián)多電平逆變器取代變壓器多重化結(jié)構(gòu)的STATCOM 拓撲結(jié)構(gòu)，用載波相移正弦脈寬調(diào)制技術(shù)(Carrier phase-shifted SPWM，以下簡稱CPS-SPWM)取代工頻調(diào)制。這種基于CPS-SPWM 級聯(lián)多電平逆變器的STATCOM 不僅去掉了多重化變壓器，而且用較低的開關(guān)頻率可以獲得較高的等效開關(guān)頻率的輸出效果，簡化了濾波；針對電力系統(tǒng)強耦合、非線性的特征，本文提出了將自抗擾控制應(yīng)用于STATCOM 裝置的控制策略，此控制策略不但可以大大縮短動態(tài)過程，改善系統(tǒng)的動態(tài)性能，而且具有較強的魯棒性。
上傳時間： 2013-11-20
上傳用戶：maqianfeng
Abstract: Uses the MAX641 switching controller and an external discrete charge pump to step up the input voltage. This circuitcan service low loads and is efficient when the output is two, three, four times the input voltage. Adding the MAX627 MOSdriver can further increase the output current capability.
標簽： 電感 開關(guān)穩(wěn)壓器 輸入電壓
上傳時間： 2013-11-15
上傳用戶：zwei41
Traditionally, an Electronic Circuit Breaker (ECB) comprisesa MOSFET, a MOSFET controller and a current senseresistor. The LTC®4213 does away with the sense resistorby using the RDS(ON) of the external MOSFET. The resultis a simple, small solution that offers a signifi cant lowinsertion loss advantage at low operating load voltage.The LTC4213 features two circuit breaking responses tovarying overload conditions with three selectable tripthresholds and a high side drive for an external N-channelMOSFET switch.
上傳時間： 2014-03-02
上傳用戶：lixinxiang
Today’s computer, datacom, and telecom systems demandpower supplies that are effi cient, respond quicklyto load transients and accurately regulate the voltageat the load. For example, load current can be measuredby using the inductor DCR, thus eliminating the needfor a dedicated sense resistor. Inductor DCR sensingincreases effi ciency—especially at heavy load—whilereducing component cost and required board space.The LTC®3856 single-output 2-phase synchronous buckcontroller improves the accuracy of inductor DCR sensingby compensating for changes in DCR due to temperature.
上傳時間： 2013-11-05
上傳用戶：guobing703
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
Telecommunication, satellite links and set-top boxes allrequire tuning a high frequency oscillator. The actualtuning element is a varactor diode, a 2-terminal device thatchanges capacitance as a function of reverse bias voltage.1 The oscillator is part of a frequency synthesizingloop, as detailed in Figure 1. A phase locked loop (PLL)compares a divided down representation of the oscillatorwith a frequency reference. The PLL’s output is levelshifted to provide the high voltage necessary to bias thevaractor, which closes a feedback loop by voltage tuningthe oscillator. This loop forces the voltage controlledoscillator (VCO) to operate at a frequency determined bythe frequency reference and the divider’s division ratio.
標簽： 開關(guān)穩(wěn)壓器 低噪聲 上傳時間： 2013-12-20
上傳用戶：ABCDE
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.
標簽： 高效率 密度 多相轉(zhuǎn)換器 高電流
上傳時間： 2013-10-08
上傳用戶：zhqzal1014
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