【正文】 1）燈泡不亮，不可調(diào)光。 狀態(tài) 元器件各級電壓 斷開交流電源，電位器 RP 的阻值 VS VT VA VK VG Vb1 Vb2 Ve 燈泡微亮?xí)r 燈泡最亮?xí)r 調(diào)試中出現(xiàn)的故障及排除方法 武漢萊斯特電子 18 第三章 常用放大器 本章節(jié)配套模塊電路： 典型應(yīng)用電路模塊 OTL 功率放大器模塊 集成運(yùn)算放大器 模塊組成： LM741 型集成運(yùn)放、電位器。信號經(jīng)過 C1 耦合送入 T1進(jìn)行放大后，從 T1集電極產(chǎn)生的信號正半周使 T2 導(dǎo)通，負(fù)半周則使 T3導(dǎo)通，經(jīng)過放大后的信號通過電容 C3 后輸出至揚(yáng)聲器。 MOS 管組成的基本 CMOS 門電路如與門、非門、或門等。讓學(xué)生能夠很直觀的看到輸出電平現(xiàn)象的同時(shí)，學(xué)習(xí)編碼器 的應(yīng)用。 JK觸發(fā)器具有置 0、置 保持和翻轉(zhuǎn)功能，在各類集成觸發(fā)器中， JK 觸發(fā)器的功能最為齊全。我們設(shè)它們均已加入了高電平，不影響電路的工作。 實(shí)驗(yàn)設(shè)置： ① 了解 74ls290 和 74ls161 兩種移位寄存器的工作原理和使用方法，對比不同之處； ○2 和其他模塊組合，實(shí)現(xiàn)一定的功能； 秒計(jì)數(shù)器 模塊組成： 輕觸按鍵、 555 芯片、 74ls290、 cd4511 和數(shù)碼管組成一個(gè)兩位 60 進(jìn)制計(jì)數(shù)器。 通過撥碼開關(guān)和扭子開關(guān)設(shè)置常見的開路和短路故障 實(shí)驗(yàn)設(shè)置： 了解多諧振蕩電路常見故障的現(xiàn)象及對故障的處 理方法 . 武漢萊斯特電子 26 波形整形及脈幅鑒別電路 說明： 熟悉掌握 555組成的施密特觸發(fā)器電路的應(yīng)用 。 not disillusioned after the heart, such as ashes, but experience the storm after the enlightenment。t 6, when we are in a positive frame of mind, you will find many good things。 to let strangers people care about your life in the good things, the original is not easy 10, do not blame, do not laugh at who, also don39。 you learn knowledge, is you have weapons, you can start from scratch, but not unarmed。t miss to regret, don39。s two laws, doing practical play highway. 2020 October 18, the Central Committee of the Communist Party of China promulgated the implementation of the the probity of the Communist Party of China selfdiscipline criterion and Chinese Communist Party discipline and punishment regulations. We Heyuan male passersby to respond positively to the call of the Central Committee of the party, earnestly anize the study party two regulations, truly grasp the essence and gist, and in their respective positions, to hold the bottom line of the discipline, build a strong ideological line of defense, with the courage to play, the courage to fight tough and fearless spirit, at the crucial moment well to plete the task, with practical action to test the study and implement effect Because of discipline in the * * * * * * * * * * * story. Here, let me to cast a brick to attract jade, speak about our highway. Highway line section of the road surface transformation project, last year towards the country 武漢萊斯特電子 36 seized will be seized one of the items. To plete this arduous task, as a project management office director Comrade, keep in mind from the Communist Party membership, recognize and identify the bottom line, strict management, and strict adherence to the quality of the project. He not only set an example, honesty and selfdiscipline, but also requires the management of all the members of the ., do not eat the construction unit one meal, do not accept the construction unit a ceremony. In this way, they didn39。 but the most important is good to cherish their own. 21, life, select the plex, is to choose the pain。t lose your life and the life, respectively is: the former is a we experienced cannot escape in a day finally will last minute, while the latter is our persistent, we want to cherish the memory of those people and things. 14, learn to smile, learn to strong, the world you know so many people, so many people and you are, you cannot change also can39。 now want anything, for fear that others know, or like to lose the same. 9, the heart move, everything in the world is followed by birth, Rangrang, important thing is often the most difficult to open one39。 I am not afraid of the truth to tell the best friend, I39。 to discipline a ruler, often the control inspection, and consciously in the ideological red line to draw the row Ming Good accumulation is indeed the bottom line, so that the heart has fear, said to have quit, the line has ended. Attached: indifferent to heart, calmly to the table in our life, there are many unpredictable things will happen, some good, some bad things, we cannot control is powerless to stop, but with time, you will find in life sometimes turns out to be not good, some bad things finally turned out to be a good thing, but then we muddy however did not know, this is the life teach us things. 1, life can be plex, can also be simple. Want simple life of precipitation, to have enough time to reflect, to make Bee 武漢萊斯特電子 29 more perfect. Life is the most important thing is not to win, but the struggle。 實(shí)驗(yàn)設(shè)置： 通過該模塊可以讓學(xué)生對 NE555 的基本功能表有實(shí)質(zhì)性的了解 . 基于５５５多諧振蕩器電路 說明： 熟悉掌握 555 組成的多諧振蕩器電路的應(yīng)用 。 實(shí)驗(yàn)設(shè)置： ① 了解 74ls194 和 74ls164 兩種移位寄存器的工作原理和使用方法，對比不同之處； ○2 和其他模塊組合，實(shí)現(xiàn)一定的功能； 計(jì)數(shù)器模塊電路 模塊組成： 電路由 74ls290 和 74ls16撥碼開關(guān)、扭子開關(guān)等組成 說明： 74ls290 和 74ls161 可以單獨(dú)作為計(jì)數(shù)器使用也可以級聯(lián)起來做計(jì)數(shù)器。 工作原理 : SD 和 RD 接至基本 RS 觸發(fā)器的輸入端，它們分別是預(yù)置和清零端，低電平有效。讓學(xué)生能夠很直觀的看到輸出電平現(xiàn)象的同時(shí)，學(xué)會(huì) RS 觸發(fā)器的使用。由于它有四個(gè)輸入端，十個(gè)輸出端，所以又稱 4 線 10 線譯碼器。并通過 LED 或者蜂鳴器來直觀顯示。 分立式 OTL 功率放大器 說明： 為互補(bǔ)對稱式 OTL 功率放大 電路 ?？蓹z測 R4 的阻值，若R4的實(shí)際阻值太小或短路，則應(yīng)更換 R4。調(diào)試前認(rèn)真、仔細(xì)核查各元器件安裝是否正確可靠，最后插上燈泡，進(jìn)行調(diào)試。接通電源后，電容經(jīng)由 R RP 充電，電容的電壓 V逐漸升高。因此，可控硅控制電流又稱觸發(fā)電流。 Rbb 是射極開路時(shí)b b2間的直流電阻，約 2～ 10kW， Rbb阻值過大或過小均不宜使用。 ，能按電路選擇和檢查元器件，能根據(jù)電路把元器件在通用線路板上正確布線（排版），能正確對電路進(jìn)行調(diào)試。測試靜態(tài)工作點(diǎn)要用直流電壓表和電流表，動(dòng)態(tài)菜蔬測試用交流電壓表和電流表完成。調(diào)整 RP1和 RP3 三極管工作在放大區(qū) . ⑵ 令輸入信號為 0，測量靜態(tài)工作點(diǎn)的參數(shù)。 實(shí)驗(yàn)電路和原理 電路原理 共射、共集、共基電路是放大電路的三種基本形式，也是組成各種復(fù)雜放大器的基本單元。并記錄到下表： IB/mA IC/mA 特性曲線、主要參數(shù)、溫度對特性的影響 ⑴ 斷開單管放大電路模塊所有的開關(guān)，將 RP4調(diào)為 0 歐、 RP1 調(diào)到 10K、 RP2調(diào)到最 大阻值； ⑵ 閉合開關(guān) S4，將萬用表打到電壓檔，將其串在 Test2 和 Test3 之間、 Test4和 Test5 之間。圖 為 NPN 管的偏置電路，和 PNP管的偏置 電路相比電源極性正好相反。而該電源專為需要大功率的系統(tǒng)而設(shè) 計(jì)。另一方面為后面實(shí)驗(yàn)提供供電電源。 電子技術(shù)綜合實(shí)驗(yàn)平臺共設(shè)置了 10 章，每章還設(shè)有若干小模塊。武漢萊斯特電子科技有限公司 2020 年 12 月 武漢萊斯特電子 1 前言 本《電子技術(shù)綜合實(shí)驗(yàn)平臺》是依據(jù)教育部 2020 年發(fā)布的《中等職業(yè)學(xué)校電子技術(shù)基礎(chǔ)與技能教學(xué)大綱》，同時(shí)參照了有關(guān)的國家職業(yè)技能標(biāo)準(zhǔn)和行業(yè)職業(yè)技能鑒定規(guī)范制定。精簡分立實(shí)驗(yàn)、加強(qiáng)集成電路應(yīng)用實(shí)驗(yàn)，特別是數(shù)字邏輯集成電路的應(yīng)用。 實(shí)驗(yàn)設(shè)置： 一方面讓學(xué)生了解電源電路常見的故障的現(xiàn)象及處理方法。 說明： 針對以上兩種電源來說同屬于小功率電源。這樣