函數(shù)信號(hào)發(fā)生器---課設(shè)報(bào)告(存儲(chǔ)版)
【正文】 次課程設(shè)計(jì)提高了我的團(tuán)隊(duì)合作水平，使我們配合更加默契，在選擇原器件和收集設(shè)計(jì)質(zhì)料以及計(jì)算相關(guān)理論參數(shù)的過程中體會(huì)了那份成功收獲的喜悅。 (3)方波幅度上升時(shí)間tr的調(diào)試1）方波輸出電壓 Up—p《=2Vcc 是因?yàn)檫\(yùn)放輸出極有 PNP 型兩種晶體組成復(fù)合互補(bǔ)對(duì)稱電路，輸出方波時(shí)，兩管輪流截止與飲和導(dǎo)通，由于導(dǎo)通時(shí)輸出電阻的影響，使方波輸出度小于電源電壓值。 2．三角波正弦波變換電路的裝調(diào) 按照三角波正弦波變換圖所示電路，裝調(diào)三角波—正弦波變換電路，其中差分發(fā)大電路的調(diào)試如下： （1）經(jīng)電容 C4 輸入差摸信號(hào)電壓 Uid=50v，F(xiàn)i =100Hz 正弦波。取平衡電阻三角波—正弦波變換電路的參數(shù)選擇原則是：隔直電容 CCC5要取得較大，因?yàn)檩敵?頻率很低，取 ，濾波電容 C6視輸出的波形而定，若含高次斜波成 分較多， C6 可取得較小， C6 一般為幾十皮法至 微法。其中 Rp1 調(diào)節(jié)三角波的幅度，Rp2 調(diào)整電路的對(duì)稱性，其并聯(lián)電阻 RE2 用來(lái)減小差分放大器的線性區(qū)。 三角波正弦波轉(zhuǎn)換電路的工作原理 圖 三角波——正弦波的變換電路三角波——正弦波的變換電路主要由差分放大電路來(lái)完成。設(shè) Uo1=+Vcc, 則++++將上式整理，得比較器翻轉(zhuǎn)的下門限單位 Uia為 若 Uo1=Vee,則比較器翻轉(zhuǎn)的上門限電位 Uia+為 比較器的門限寬度 由以上公式可得比較器的電壓傳輸特性，如圖所示。Uo 通過 R3 對(duì)電容 C 正向充電，如圖中實(shí)線箭頭所示。差分放大器具有工作點(diǎn)穩(wěn)定，輸入阻抗高，抗干擾能力較強(qiáng)等優(yōu)點(diǎn)。精密穩(wěn)壓、穩(wěn)流電源還可作為檢定某些電工儀表用的穩(wěn)壓、穩(wěn)流電源。s turn to be acplished by former Fang Bo that first order produces importing, the integrator produces a triangle then by opposition wave, the wave and the sine wave changing, owe a scheme characteristics such as have economy , convenient , pragmatic finally in similar third stage diode circuit realization triangle. Be posed of the Fang Bo triangle wave creation circuit from the parator and the integrator, Fang Bo that the parator exports gets a triangle after the integrator wave, e the triangle wave alternation circuit to the sine wave to be pleted mainly from differences the amplifier. Differences amplifiers have working spot stability , entering impedance height , the antiinterference ability waits for merit paratively by force. Can restrain the zero drift effectively when being directcurrent amplifier especially,the wave shifts Cheng Zheng string therefore with very low triangle of frequency wave. The principle that wave form shifts is to make use of differences amplifier transmission characteristic property curve nonlinearity.Key word: triangle mainly wave Fang Bo , sine wave 目 錄課程設(shè)計(jì)成績(jī)?cè)u(píng)定表……………………………………………………………I摘要………………………………………………………………………………IIAbstract…………………………………………………………………………III目錄………………………………………………………………………………IV
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