【正文】 6 會(huì)用萬(wàn)用表判別三極管的引腳和質(zhì)量?jī)?yōu)劣。接上電源線，為單管放大電路模塊提供電壓。將測(cè)量的數(shù)據(jù)填入下表： 測(cè)量?jī)?nèi)容 截止失真 飽和失真 UCE(V) ICQ(mA) UO波形 場(chǎng)效應(yīng)晶體管放大電路實(shí)驗(yàn) 選用模塊：場(chǎng)效應(yīng)晶體管放大電路、三端可調(diào)式集成式穩(wěn)壓電源模塊。圖二所示是單結(jié)晶體管的圖形符號(hào)，發(fā)射極箭頭傾斜指向b1，表示經(jīng) PN 結(jié)的電流只流向 bl極。二是控制極與陰極之間也要接正向電壓； ② 晶閘管一旦導(dǎo)通后，降低或去掉控制極電壓，晶閘管仍然導(dǎo)通； ③ 晶閘管導(dǎo)通后要關(guān)斷時(shí)，必須減小其陽(yáng)極電流使其小于晶閘管的導(dǎo)通維持電流。由 BT33 組成的單結(jié)晶體管張弛振蕩器停振，可造成燈泡不亮，不可調(diào)光。 電路中電容 C2 為自舉電容，它和 R2 及 R3 組成自舉電路，使 B點(diǎn)的電位隨輸出電壓的增高而增高，擴(kuò)大了電路的動(dòng)態(tài)范圍。 數(shù)碼管顯示 說(shuō)明： CD4511 是一個(gè)用于驅(qū)動(dòng)共陰極 LED （數(shù)碼管）顯示器的 BCD 碼 — 七段碼譯碼器，特點(diǎn)：具有 BCD 轉(zhuǎn)換、消隱和鎖存控制、七段譯碼及驅(qū)動(dòng)功能的 CMOS 電路能夠提供較大的拉電流，可直接驅(qū)動(dòng) LED 顯示器。 實(shí)驗(yàn)設(shè)置： 本模塊以 74LS74 D 觸發(fā)器為例，用撥碼開關(guān)配置芯片的不同工作狀態(tài)，用輕觸按鍵作 CP 時(shí)鐘輸入，輸出二進(jìn)制代碼以發(fā)光二極管指示，同時(shí)留端口為后續(xù)使用。 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： 了解施密特觸發(fā)電路常見故障的現(xiàn)象及對(duì)故障的處理方法 . 雙音報(bào)警器 第十章 綜合應(yīng)用 數(shù)字時(shí)鐘 說(shuō)明： 555產(chǎn)生時(shí)鐘脈沖的純數(shù)電數(shù)字時(shí)鐘 函數(shù)發(fā)生器模塊 說(shuō)明： 用單片機(jī)、模擬電路組成一個(gè)綜合波形發(fā)生器。 and when we are in a negative state of mind, you will find many depressed things。 how do you treat people, does not represent how others treat you, if cannot see through this point, only inviting worry. 18, time is like a sponge in the water, as long as you are willing to squeeze, the total water is still there. Every life, after the ups and downs The best test of live, to life, survival and continuation, do not stop the struggle in the joys and sorrows of life on the road, so that different soul to bear life beat, acceptance of 武漢萊斯特電子 33 suffering. 19, indifferent to heart, calmly in table, elegant and fortable life, do not take what is so important. The pursuit will be disappointed。 life is a simple, calm and peaceful. Always not to choose their own path and regret, life is like a train, the scenery and then the United States will retreat, the passage of time and encounter will eventually drifting further and further away, before is always himself. 25, everyone has a weakness, weakness is true humanity. That has no weakness, a shallow person. That people think there is no weakness, mostly false. Life has shortings, there are shortings is the real life. That no 武漢萊斯特電子 35 one regret, or childish or numbness or Self deception. It is in tolerance of weakness and so on to accept, people live happily. Hello, everyone! I am a party member. The title of my speech is: study and implement the party39。t envy him A sum of, don39。t be narrowminded. Poke to care, is a kind of 武漢萊斯特電子 30 openminded, a free and easy. 5, I am not afraid of others behind me a knife, I afraid to look back and see stab me, is my intention to treat people。在輸入引腳上通過撥碼開關(guān)選擇不同電壓信號(hào)的輸入，控制引腳上通過扭子開關(guān)選擇高低電平，輸出引腳上接不同的顯示器件，并設(shè)置測(cè)試點(diǎn) 方便波 形及電壓的測(cè)試。 D 觸發(fā)器 說(shuō)明： D 觸發(fā)器只有一個(gè)信號(hào)輸入端，時(shí)鐘脈沖 CP 未到來(lái)時(shí)，輸入端的信號(hào)不起任何作用，只有在 CP 信號(hào)到來(lái)的瞬間，輸出立即變成于輸入相同的 電平。 譯碼器 說(shuō)明： 譯碼是編碼的逆過程，本節(jié)以二 十進(jìn)制譯碼器為例，將四位 BCD 碼的十進(jìn)制代碼翻譯成 09 十個(gè)對(duì)應(yīng)輸出信號(hào)的電路。 實(shí)驗(yàn)設(shè)置： 本實(shí)驗(yàn)中，學(xué)會(huì)識(shí)別及檢測(cè)集成功率放大器及色環(huán)電阻，電容等常用電子元件的好壞，會(huì)搭建由集成功放組成的 OTL 功率放大器，會(huì)測(cè)試 OTL功率放大器主要性能指標(biāo)。 實(shí)驗(yàn)內(nèi)容 （ 1）由于電路直接與市電相連，調(diào)試時(shí)應(yīng)注意安全，防止觸電。 可控硅和三極管的共同點(diǎn)在于：都是電流控制器件，都可以起到開關(guān)作用；不同點(diǎn)在于：三極管需要電流持續(xù)控制，可精確控制，可控硅導(dǎo)通后可以撤消控制電流，控制電流失去控制作用，負(fù)載電流取決于負(fù)載大小，可控硅在無(wú)控制電流和負(fù)載電流情況下會(huì)自動(dòng)關(guān)斷。 實(shí)驗(yàn)要求 原理，了解晶閘管調(diào)光電路實(shí)際應(yīng)用。將測(cè)量的數(shù)據(jù)填入下表： 測(cè)量數(shù)據(jù) UBQ UEQ UCQ UBEQ UCEQ ICQ 實(shí)測(cè)值 計(jì)算值 放大電路分壓式偏置電路靜態(tài)工作點(diǎn)的調(diào)整與測(cè)量 ⑴ 上述設(shè)置不變，將 S3 閉合。 ⑷ 不斷的減小 RP2的電阻，測(cè)量基極電流 IB 和集電極電流 IC。 說(shuō)明： 針對(duì)以上兩種電源來(lái)說(shuō)同屬于小功率電源。精簡(jiǎn)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。 電子技術(shù)綜合實(shí)驗(yàn)平臺(tái)共設(shè)置了 10 章，每章還設(shè)有若干小模塊。而該電源專為需要大功率的系統(tǒng)而設(shè) 計(jì)。并記錄到下表： IB/mA IC/mA 特性曲線、主要參數(shù)、溫度對(duì)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(wàn)用表打到電壓檔，將其串在 Test2 和 Test3 之間、 Test4和 Test5 之間。調(diào)整 RP1和 RP3 三極管工作在放大區(qū) . ⑵ 令輸入信號(hào)為 0，測(cè)量靜態(tài)工作點(diǎn)的參數(shù)。 ，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(duì)電路進(jìn)行調(diào)試。因此，可控硅控制電流又稱觸發(fā)電流。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。 分立式 OTL 功率放大器 說(shuō)明： 為互補(bǔ)對(duì)稱式 OTL 功率放大 電路 。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。 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。 實(shí)驗(yàn)設(shè)置： 通過該模塊可以讓學(xué)生對(duì) 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(shuō)明： 熟悉掌握 555 組成的多諧振蕩器電路的應(yīng)用 。 I am not afraid of the truth to tell the best friend, I39。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。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