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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.
標(biāo)簽：
諧振器
論文
上傳時間：
2013-10-08
上傳用戶：wuyuying
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高速數(shù)字系統(tǒng)設(shè)計下載pdf:High-Speed Digital SystemDesign—A Handbook ofInterconnect Theory and DesignPracticesStephen H. HallGarrett W. HallJames A. McCallA Wiley-Interscience Publication JOHN WILEY & SONS, INC.New York • Chichester • Weinheim • Brisbane • Singapore • TorontoCopyright © 2000 by John Wiley & Sons, Inc.speeddigital systems at the platform level. The book walks the reader through everyrequired concept, from basic transmission line theory to digital timing analysis, high-speedmeasurement techniques, as well as many other topics. In doing so, a unique balancebetween theory and practical applications is achieved that will allow the reader not only tounderstand the nature of the problem, but also provide practical guidance to the solution.The level of theoretical understanding is such that the reader will be equipped to see beyondthe immediate practical application and solve problems not contained within these pages.Much of the information in this book has not been needed in past digital designs but isabsolutely necessary today. Most of the information covered here is not covered in standardcollege curricula, at least not in its focus on digital design, which is arguably one of the mostsignificant industries in electrical engineering.The focus of this book is on the design of robust high-volume, high-speed digital productssuch as computer systems, with particular attention paid to computer busses. However, thetheory presented is applicable to any high-speed digital system. All of the techniquescovered in this book have been applied in industry to actual digital products that have beensuccessfully produced and sold in high volume.Practicing engineers and graduate and undergraduate students who have completed basicelectromagnetic or microwave design classes are equipped to fully comprehend the theorypresented in this book. At a practical level, however, basic circuit theory is all thebackground required to apply the formulas in this book.
標(biāo)簽：
高速數(shù)字
系統(tǒng)設(shè)計
上傳時間：
2013-10-26
上傳用戶：縹緲
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OPTOELECTRONICS CIRCUIT COLLECTION
AVALANCHE PHOTODIODE BIAS SUPPLY 1Provides an output voltage of 0V to +80V for reverse biasingan avalanche photodiode to control its gain. This circuit canalso be reconfigured to supply a 0V to –80V output.LINEAR TEC DRIVER–1This is a bridge-tied load (BTL) linear amplifier for drivinga thermoelectric cooler (TEC). It operates on a single +5Vsupply and can drive ±2A into a common TEC.LINEAR TEC DRIVER–2This is very similar to DRIVER–1 but its power output stagewas modified to operate from a single +3.3V supply in orderto increase its efficiency. Driving this amplifier from astandard +2.5V referenced signal causes the output transistorsto have unequal power dissipation.LINEAR TEC DRIVER–3This BTL TEC driver power output stage achieves very highefficiency by swinging very close to its supply rails, ±2.5V.This driver can also drive ±2A into a common TEC. Operationis shown with the power output stage operating on±1.5V supplies. Under these conditions, this linear amplifiercan achieve very high efficiency.
Application ReportThe following collection of analog circuits may be useful in electro-optics applications such as optical networkingsystems. This page summarizes their salient characteristics.
標(biāo)簽：
光電轉(zhuǎn)換
電路設(shè)計
上傳時間：
2013-10-27
上傳用戶：落花無痕
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I.1 IntroductionI.2 Analog Integrated Circuit DesignI.3 Technology OverviewI.4 NotationI.5 Analog Circuit Analysis Techniques
標(biāo)簽：
Circuit
Analog
CMOS
Desi
上傳時間：
2013-10-29
上傳用戶：jokey075
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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.
標(biāo)簽：
Rogers
Radio
John
Freq
上傳時間：
2014-12-23
上傳用戶：han_zh
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Finite state machines are widely used in digital circuit designs. Generally, when designing a state machine using an HDL, the synthesis tools will optimize away all states that cannot be reached and generate a highly optimized circuit. Sometimes, however, the optimization is not acceptable. For example, if the circuit powers up in an invalid state, or the circuit is in an extreme working environment and a glitch sends it into an undesired state, the circuit may never get back to its normal operating condition.
標(biāo)簽：
Creating
Machines
Mentor
State
上傳時間：
2013-10-08
上傳用戶：wangzhen1990
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Arduino 是一塊基于開放原始代碼的Simple i/o 平臺，并且具有使用類似java,C 語言的開發(fā)環(huán)境。讓您可以快速 使用Arduino 語言與Flash 或Processing…等軟件，作出互動作品。Arduino 可以使用開發(fā)完成的電子元件例如Switch 或Sensors 或其他控制器、ＬＥＤ、步進(jìn)電機(jī)或其他輸出裝置。Arduino 也可以獨立運作成為一個可以跟軟件溝通的平臺，例如說：flash processing Max/MSP VVVV 或其他互動軟件…
Arduino 開發(fā)ＩＤＥ界面基于開放原始碼原則，可以讓您免費下載使用開發(fā)出更多令人驚奇的互動作品。 什么是Roboduino?
DFRduino 與Arduino 完全兼容，只是在原來的基礎(chǔ)上作了些改進(jìn)。Arduino 的IO 使用的孔座，做互動作品需要面包板和針線搭配才能進(jìn)行，而DFRduino 的IO 使用針座，使用我們的杜邦線就可以直接把各種傳感器連接到DFRduino 上。
特色描述
1． 開放原始碼的電路圖設(shè)計，程式開發(fā)界面免費下載，也可依需求自己修改!!
2． DFRduino 可使用ISP 下載線，自我將新的IC 程序燒入「bootloader」；
3． 可依據(jù)官方電路圖，簡化DFRduino 模組，完成獨立云作的微處理控制器；
4． 可簡單地與傳感器、各式各樣的電子元件連接(如：紅外線,超聲波,熱敏電阻,光敏電阻,伺服電機(jī)等)；
5． 支援多樣的互動程式 如: Flash,Max/Msp,VVVV,PD,C,Processing 等；
6． 使用低價格的微處理控制器(ATMEGA168V-10PI)；
7． USB 接口，不需外接電源，另外有提供9VDC 輸入接口；
8． 應(yīng)用方面，利用DFRduino，突破以往只能使用滑鼠，鍵盤，CCD 等輸入的裝置的互動內(nèi)容，可以更簡單地達(dá)成單人或多人游戲互動。
性能描述
1． Digital I/O 數(shù)字輸入/輸出端共 0~13。
2． Analog I/O 模擬輸入/輸出端共 0~5。
3． 支持USB 接口協(xié)議及供電(不需外接電源)。
4． 支持ISP 下載功能。
5． 支持單片機(jī)TX/RX 端子。
6． 支持USB TX/RX 端子。
7． 支持AREF 端子。
8． 支持六組PWM 端子(Pin11,Pin10,Pin9，Pin6,Pin5,Pin3)。
9． 輸入電壓：接上USB 時無須外部供電或外部5V~9V DC 輸入。
10．輸出電壓：5V DC 輸出和3.3V DC 輸出 和外部電源輸入。
11．采用Atmel Atmega168V-10PI 單片機(jī)。
12．DFRduino 大小尺寸：寬70mm X 高54mm。
Arduino開發(fā)板圖片
標(biāo)簽：
Arduino
控制器
圖文教程
上傳時間：
2014-01-14
上傳用戶：909000580
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R7732_7733_7735是Richpower公司推出的高效AC TO DC 電源PWM控制芯片,最大功率可以做到75W;如有需求請聯(lián)系我電話：021-54262182EXT 114 (Eric) QQ ：1187337351
標(biāo)簽：
Control
7732
chip
PWM
上傳時間：
2013-11-20
上傳用戶：xz85592677
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特點（FEATURES） 精確度0.03%滿刻度（Accuracy 0.03%F.S.） 頻率輸入范圍0.01Hz至80KHz（Input range from 0.01 Hz to 80KHz） 16 BIT 隔離類比輸出（16 bit DAC isolating analog output） 輸入與輸出1/輸出2絕緣耐壓 2仟伏特/1分鐘（Dielectric strength 2KVac/1min.（input/output1/output2）） 寬范圍交直流兩用電源設(shè)計（Wide input range for auxiliary power） 尺寸小，穩(wěn)定性高（Dimension small & High stability）
標(biāo)簽：
微電腦
傳送器
頻率
隔離
上傳時間：
2013-10-21
上傳用戶：dljwq
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Abstract: A resistive feedback network is often used to set the output voltage of a power supply. A mechanical potentiometer (pot)conveniently solves the problem of adjusting a power supply. For easier automatic calibration, a mechanical pot can be replaced witha digital pot. This application note presents a calibration solution that uses a digital pot, because digipots are smaller, do not movewith age or vibration, and can be recalibrated remotely. This proposed solution reduces the susceptibility of the system to thetolerance of the digital pot's end-to-end resistance, making the solution optimal fordesigners. This application note also explainssome of the equations required to calculate the resistor chain values and to use a digital pot in this way. A spreadsheet withstandard reisistor values is available for easy calculations.
標(biāo)簽：
電源供應(yīng)器
數(shù)字電位器
應(yīng)用筆記
校準(zhǔn)
上傳時間：
2013-10-31
上傳用戶：caiguoqing
