·《信號(hào)處理引論》【國外電子與通信教材系列】 【原書作者】: [美]James H. McClellan/ Ronald W. Schafer/ Mark A. Yoder【譯者】:周利清 等【出版社】 : 電子工業(yè)出版社【出版日期】:2005年4月【文件格式】:超星 本書是作者根據(jù)他們近十年的教學(xué)和研究
標(biāo)簽: 信號(hào)處理
上傳時(shí)間: 2013-04-24
上傳用戶:shuiyuehen1987
·《嵌入式軟件基礎(chǔ):C語言與匯編的融合》(Fundamentals of Embedded Software)(Daniel W. Lewis)英文版[PDF]
上傳時(shí)間: 2013-07-06
上傳用戶:kernaling
自定義的組件包。其中包含了市場上很炫的優(yōu)秀的用戶體驗(yàn)組件, 供大家業(yè)務(wù)開發(fā)用。
標(biāo)簽: android-w android widget song
上傳時(shí)間: 2013-05-16
上傳用戶:huannan88
Sparse LU Decomposition using FPGA,使用fpga實(shí)現(xiàn)lu分解的算法實(shí)現(xiàn)
標(biāo)簽: Decomposition Sparse using FPGA
上傳時(shí)間: 2013-08-14
上傳用戶:Vici
ID 型號(hào)廠家用途構(gòu)造溝道v111(V) ixing(A) pdpch(W) waixing 1 2SJ11 東芝DC, LF A, JChop P 20 -10m 100m 4-2 2 2SJ12 東芝DC, LF A,J Chop P 20 -10m 100m 4-2 3 2SJ13 東芝DC, LF A, JChop P 20 -100m 600m 4-35 4 2SJ15 富士通DC, LF A J P 18 -10m 200m 4-1 5 2SJ16 富士通DC, LF A J P 18 -10m 200m 4-1 6 2SJ17 C-MIC J P 20 0.5m 10m 4-47 7 2SJ18 LF PA J(V) P 170 -5 63 4-45 8 2SJ19 NEC LF D J(V) P 140 -100m 800m 4-41 9 2SJ20 NEC LF PA J(V) P 100 -10 100 4-42 10 2SJ22 C-MIC J P 80 0.5m 50m 4-48 11 2SJ39 三菱LF A J P 50 -10m .15/CH 4-81 12 2SJ40 三菱LF A,A-SW J P 50 -10m 300m 4-151 13 2SJ43 松下LF A J P 50 20m 250m 4-80A 14 2SJ44 NEC LF LN A J P 40 -10m 400m 4-53A 15 2SJ45 NEC LF A J P 40 -10m 400m 4-53A 16 2SJ47 日立LF PA MOS P -100 -7 100 4-28A 17 2SJ48 日立LF PA, HS MPOSSW P -120 -7 100 4-28A 18 2SJ49 日立LF PA,HS PMSOWS P -140 -7 100 4-28A 19 2SJ49(H) 日立HS PSW MOS P -140 -7 100 4-28A 20 2SJ50 日立LF/HF PA,HMSO SPSW P -160 -7 100 4-28A 21 2SJ50(H) 日立HS PSW MOS P -160 -7 100 4-28A 22 2SJ51 日立LF LN A J P 40 -10m 800m 4-97A 23 2SJ55 日立LF/HF PA,HMSO SPSW P -180 -8 125 4-28A
標(biāo)簽: MOS 開關(guān)管 參數(shù)
上傳時(shí)間: 2013-10-10
上傳用戶:13162218709
第四章 信號(hào)分離電路 第四章 信號(hào)分離電路第一節(jié) 濾波器的基本知識(shí)一、濾波器的功能和類型1、功能:濾波器是具有頻率選擇作用的電路或運(yùn)算處理系統(tǒng),具有濾除噪聲和分離各種不同信號(hào)的功能。2、類型:按處理信號(hào)形式分:模擬濾波器和數(shù)字濾波器按功能分:低通、高通、帶通、帶阻按電路組成分:LC無源、RC無源、由特殊元件構(gòu)成的無源濾波器、RC有源濾波器按傳遞函數(shù)的微分方程階數(shù)分:一階、二階、高階第一節(jié) 濾波器的基本知識(shí) 第一節(jié) 濾波器的基本知識(shí)二、模擬濾波器的傳遞函數(shù)與頻率特性(一)模擬濾波器的傳遞函數(shù)模擬濾波電路的特性可由傳遞函數(shù)來描述。傳遞函數(shù)是輸出與輸入信號(hào)電壓或電流拉氏變換之比。經(jīng)分析,任意個(gè)互相隔離的線性網(wǎng)絡(luò)級(jí)聯(lián)后,總的傳遞函數(shù)等于各網(wǎng)絡(luò)傳遞函數(shù)的乘積。這樣,任何復(fù)雜的濾波網(wǎng)絡(luò),可由若干簡單的一階與二階濾波電路級(jí)聯(lián)構(gòu)成。 第一節(jié) 濾波器的基本知識(shí)(二)模擬濾波器的頻率特性模擬濾波器的傳遞函數(shù)H(s)表達(dá)了濾波器的輸入與輸出間的傳遞關(guān)系。若濾波器的輸入信號(hào)Ui是角頻率為w的單位信號(hào),濾波器的輸出Uo(jw)=H(jw)表達(dá)了在單位信號(hào)輸入情況下的輸出信號(hào)隨頻率變化的關(guān)系,稱為濾波器的頻率特性函數(shù),簡稱頻率特性。頻率特性H(jw)是一個(gè)復(fù)函數(shù),其幅值A(chǔ)(w)稱為幅頻特性,其幅角∮(w)表示輸出信號(hào)的相位相對(duì)于輸入信號(hào)相位的變化,稱為相頻特性。
上傳時(shí)間: 2014-12-23
上傳用戶:wutong
2-1 何謂測量放大電路?對(duì)其基本要求是什么? 在測量控制系統(tǒng)中,用來放大傳感器輸出的微弱電壓,電流或電荷信號(hào)的放大電路稱為測量放大電路,亦稱儀用放大電路。對(duì)其基本要求是:①輸入阻抗應(yīng)與傳感器輸出阻抗相匹配;②一定的放大倍數(shù)和穩(wěn)定的增益;③低噪聲;④低的輸入失調(diào)電壓和輸入失調(diào)電流以及低的漂移;⑤足夠的帶寬和轉(zhuǎn)換速率(無畸變的放大瞬態(tài)信號(hào));⑥高輸入共模范圍(如達(dá)幾百伏)和高共模抑制比;⑦可調(diào)的閉環(huán)增益;⑧線性好、精度高;⑨成本低。 2-2 圖2-2a所示斬波穩(wěn)零放大電路中,為什么采用高、低頻兩個(gè)通道,即R3、C3組成的高頻通道和調(diào)制、解調(diào)、交流放大器組成的低頻通道? 采用高頻通道是為了使斬波穩(wěn)零放大電路能在較寬的頻率范圍內(nèi)工作,而采用低頻通道則能對(duì)微弱的直流或緩慢變化的信號(hào)進(jìn)行低漂移和高精度的放大。 2-3 請(qǐng)參照?qǐng)D2-3,根據(jù)手冊(cè)中LF347和CD4066的連接圖(即引腳圖),將集成運(yùn)算放大器LF347和集成模擬開關(guān)CD4066接成自動(dòng)調(diào)零放大電路。 LF347和CD4066接成的自動(dòng)調(diào)零放大電路如圖X2-1。
標(biāo)簽: 信號(hào)放大電路
上傳時(shí)間: 2013-10-09
上傳用戶:ysjing
高速數(shù)字系統(tǒng)設(shè)計(jì)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(jì)
上傳時(shí)間: 2013-10-26
上傳用戶:縹緲
我司是專業(yè)PCB樣板制造的生產(chǎn)企業(yè)www.syjpcb.com/w 現(xiàn)在我司工程部提供的PCB設(shè)計(jì)規(guī)則要求
標(biāo)簽: PCB 可制造性 設(shè)計(jì)技術(shù)
上傳時(shí)間: 2013-12-17
上傳用戶:fanxiaoqie
電路板故障分析 維修方式介紹 ASA維修技術(shù) ICT維修技術(shù) 沒有線路圖,無從修起 電路板太複雜,維修困難 維修經(jīng)驗(yàn)及技術(shù)不足 無法維修的死板,廢棄可惜 送電中作動(dòng)態(tài)維修,危險(xiǎn)性極高 備份板太多,積壓資金 送國外維修費(fèi)用高,維修時(shí)間長 對(duì)老化零件無從查起無法預(yù)先更換 維修速度及效率無法提升,造成公司負(fù)擔(dān),客戶埋怨 投資大量維修設(shè)備,操作複雜,績效不彰
上傳時(shí)間: 2013-10-26
上傳用戶:neu_liyan
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