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1、設(shè)計(jì)報(bào)告院系:機(jī)械工程學(xué)院名稱(chēng):模擬電子技術(shù)基礎(chǔ)課程設(shè)計(jì)題目:峰值檢測(cè)電路班級(jí):測(cè)控技術(shù)與儀器091201學(xué)號(hào):學(xué)生姓名:···指導(dǎo)教師:···設(shè)計(jì)周數(shù):一周日期:2011年12月28日17前言現(xiàn)代生活有哪些離得開(kāi)電子技術(shù)?幾乎沒(méi)有。電子技術(shù)在不斷完善我們的生活,服務(wù)于我們,所以掌握電子技術(shù)具有很大的好處。經(jīng)過(guò)一學(xué)期的模擬電子技術(shù)的學(xué)習(xí),我們已掌握了它的基礎(chǔ)。理論服務(wù)于實(shí)踐,我們有必要通過(guò)一定的模擬電子實(shí)習(xí)來(lái)證明自己的收獲。本設(shè)計(jì)為峰值檢測(cè)電路,組成部分為波形輸入部分,峰值檢測(cè)部分和峰值顯示輸出部分。設(shè)計(jì)的目
2、的就是檢測(cè)輸入波形的最大值。設(shè)計(jì)原理也簡(jiǎn)單易懂,但對(duì)于最初的要求已經(jīng)達(dá)到,且誤差較小。設(shè)計(jì)匆忙,定有不足,希望老師不吝賜教。設(shè)計(jì)者2011年12月28日17目錄一、設(shè)計(jì)內(nèi)容············································(5)1.1設(shè)計(jì)目的·····················································(5)1.2設(shè)計(jì)要求·····················································(
3、5)1.3設(shè)計(jì)方框圖···················································(6)二、理論分析····················································(6)三、電壓峰值檢測(cè)電路···········································(7)3.1峰值檢測(cè)的概念···············································(7)3.2峰值檢測(cè)原理·······
4、··········································(8)17一、理論計(jì)算···················································(10)二、仿真結(jié)果及分析············································(11)5.1仿真過(guò)程····················································(11)5.2調(diào)試與故障檢測(cè)···················
5、···························(13)三、設(shè)計(jì)總結(jié)···················································(13)四、心得體會(huì)···················································(13)五、參考文獻(xiàn)···················································(14)六、總的電路圖17··································
6、················(15)一、元器件清單···················································(16)17一、設(shè)計(jì)內(nèi)容1.1設(shè)計(jì)目的1.使學(xué)生在學(xué)完了《模擬電子技術(shù)》課程的基本理論,基本知識(shí)后,能夠綜合運(yùn)用所學(xué)理論知識(shí)、拓寬知識(shí)面,系統(tǒng)地進(jìn)行電子電路的工程實(shí)踐訓(xùn)練,鍛煉動(dòng)手能力,培養(yǎng)工程師的基本技能,提高分析問(wèn)題和解決問(wèn)題的能力。2.熟悉集成電路的引腳安排,掌握各芯片的邏輯功能及使用方法,了解面包板結(jié)構(gòu)及其接線方法,了解峰值運(yùn)算電路的組成及工作原理
7、。3.培養(yǎng)獨(dú)立思考、獨(dú)立準(zhǔn)備資料、獨(dú)立設(shè)計(jì)規(guī)定功能的數(shù)字時(shí)鐘系統(tǒng)的能力。4.培養(yǎng)書(shū)寫(xiě)綜合設(shè)計(jì)實(shí)驗(yàn)報(bào)告的能力1.2設(shè)計(jì)要求設(shè)計(jì)一個(gè)峰值運(yùn)算電路,使其能夠?qū)⑤斎胄盘?hào)的峰值顯示出來(lái)。1.3設(shè)計(jì)方框圖17峰值引入部分峰值檢測(cè)峰值顯示輸出圖1設(shè)計(jì)方框圖二、理論分析波形引入波形引入部分較為簡(jiǎn)單,在電路的開(kāi)始加入一個(gè)波形發(fā)生器即可,注意波形發(fā)生器的引入方法。最好加入一個(gè)能產(chǎn)生不規(guī)則波形的波形發(fā)生器,這樣檢測(cè)到的峰值就是不斷變換的,若引入的時(shí)正弦波,則檢測(cè)顯示的結(jié)果就是一條直線。17圖2波形引入部分電路三、電壓峰值檢測(cè)電路3
8、.1峰值檢測(cè)的概念峰值檢測(cè)電路在AGC(自動(dòng)增益控制)電路和傳感器最值求取電路中廣泛應(yīng)用,自己平時(shí)一般作為程控增益放大器倍數(shù)選擇的判斷依據(jù)。峰值檢測(cè)電路(PKD,PeakDetector)的作用是對(duì)輸入信號(hào)的峰值進(jìn)行提取,產(chǎn)生輸出Vo=Vpeak,為了實(shí)現(xiàn)這樣的目標(biāo),電路輸出值會(huì)一直保持,直到一個(gè)新的更大的峰值出現(xiàn)或電路復(fù)位。就是要對(duì)信號(hào)的峰值進(jìn)行采集并保持。其效果如下如(MS畫(huà)圖工具繪制):17圖