【正文】 ，三個(gè)電極之間的電壓關(guān)系為：（ UC UB UE） ,實(shí)現(xiàn)了發(fā)射結(jié)的正向偏置，集電結(jié)的反向偏置。 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。 實(shí)驗(yàn)儀表 萬(wàn)用表兩塊； 雙蹤示波器一臺(tái)； 信號(hào)發(fā)生器一臺(tái)； 低頻毫伏表一臺(tái)。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。場(chǎng)效應(yīng)管是一個(gè)電壓控制元件，由場(chǎng)效應(yīng)管構(gòu)成的電壓放大電路，仍需要設(shè)置合適的靜態(tài)工作點(diǎn)，以滿足動(dòng)態(tài)放大不失真要求。 實(shí)驗(yàn)要求 原理，了解晶閘管調(diào)光電路實(shí)際應(yīng)用。 單結(jié)晶體管的主要參數(shù)有基極直流電阻 Rbb 和分壓比。 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(kāi)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。接通電源前，電容 C上電壓為零。 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。 （ 3）調(diào)節(jié)電位器 RP 至最小位置時(shí)，燈泡突然熄滅。 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)。 第四章 波形發(fā)生電路 本章節(jié)配套模塊電路： RC 橋式正弦波振蕩電路 LC 正弦波振蕩器電路 三角波發(fā)生器 8038 集成函數(shù)發(fā)生器 RC 橋式正弦波振蕩電路 模塊組成： 電容、電阻、電位器、二極管、集成運(yùn)放 LM471 說(shuō)明： 可通過(guò)調(diào)節(jié)電位器來(lái)改變正弦波的頻率和幅度 實(shí)驗(yàn)設(shè)置： ① 通過(guò)實(shí)驗(yàn)了解 RC橋式正弦波振蕩電路的工作原理； 武漢萊斯特電子 20 LC 正弦波振蕩器電路 模塊組成： 三極管、電阻、電容、電感組成 說(shuō)明： 可以通過(guò)示波器觀察其現(xiàn)象 實(shí)驗(yàn)設(shè)置： ① 通過(guò)實(shí)驗(yàn)了解 LC正弦波振蕩電路的工作原理； 三角波發(fā)生器 模塊組成： 雙向穩(wěn)壓管、電阻、電位器、電容、電感和 LM741 組成 說(shuō)明： 可以通過(guò)示波器觀察其現(xiàn)象 實(shí)驗(yàn)設(shè)置： ① 通過(guò)實(shí)驗(yàn)了解三角波發(fā)生器電路的工作原理； 8038 集成函數(shù)發(fā)生器 模塊組成： 電阻、電容、電位器以及 8038 集成函數(shù)發(fā)生器組成 說(shuō)明： 可以通過(guò)示波器觀察其現(xiàn) 象 實(shí)驗(yàn)設(shè)置： ① 通過(guò)實(shí)驗(yàn)了解集成函數(shù)發(fā)生器的應(yīng)用方法； 第五章 數(shù)字電路基礎(chǔ) 本章節(jié)配套模塊電路： 三種基本邏輯門及 OC 邏輯門電路模塊 三種基本邏輯門及 OC 邏輯門電路模塊 模塊組成： 三種基本邏輯門電路模塊 ,通過(guò)三極管、二極管等組成的（ TTL ）與門、或門、非門。 譯碼器 說(shuō)明： 譯碼是編碼的逆過(guò)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： 本模塊以 74LS279 四圖騰柱輸出 SR鎖存器 為例，用扭子開(kāi)關(guān)配置使能芯片，用撥碼開(kāi)關(guān)為碼型 R、 S 輸入，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)留下端口為后續(xù)使用。 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。通過(guò)連線與顯示模塊連接便可以方便的觀察現(xiàn)象。在輸入引腳上通過(guò)撥碼開(kāi)關(guān)選擇不同電壓信號(hào)的輸入，控制引腳上通過(guò)扭子開(kāi)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。 to implement , do not want to, dare not, not with disciplinary ruler to supervision。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。 you pain, no one can understand. Then you only tears to smile. 8, each people have youth, Each youth are a story, the life of the world never gets easier, I want what, wish the world all know, as has been the same。t envy him A sum of, don39。 to get, must work to。 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 wait for old just miss. Time to return, seize every moment, again painstakingly again tired also Those struggling to fly. 23, life could not Yimapingchuan, even flat pavement, inevitably there will be a few pieces of roadblocks. Some of the rocks around the past, while others have to move it out. Just move others put the stone is very easy, because the stone from the appearance we can discern。 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。t envy who. Like a person is a kind of feeling, not like a person is true. The truth is easy to explain, I feel Is unspeakable. The best travel life is that you in a strange place found a long lost touched. 11, happy life not in the bustling in, and in the peace of mind。 and when we are in a negative state of mind, you will find many depressed things。 not unrewarding perfunctorily, but calm attitude of life of unrestrained selfconfidence. Plain living, there is no noise noisy, no earthly troubles, more did not fill in the discontent of desire, some just a calm, a calm. 3, memory of heart will not good things to erase the, life is a When no movie, pain is a beginning, the struggle is a kind of process, death is a kind of ending. Give up this giving up is the helpless, do not give up the abandoned, do not give up this giving up is ignorance, do not give up should not give up is persistent. 4, a thing figured is heaven, think impassability is hell. Since the living, to live better. Sometimes we because of too narrowminded, too care around the chores and penny wise and pound foolish, not worth the candle. Some things to attract trouble and worry, pletely depends on how we look at and deal with it. Don39。 通過(guò)撥碼開(kāi)關(guān)和扭子開(kāi)關(guān)設(shè)置常見(jiàn)的開(kāi)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(jiàn)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。 說(shuō)明： 555芯片產(chǎn)生一個(gè) 1S的時(shí)鐘脈沖，由 74ls290 計(jì)數(shù)，并通過(guò) CD4511譯碼，兩位數(shù)碼管顯示出來(lái)。 實(shí)驗(yàn)設(shè)置： 本模塊以 74LS74 D 觸發(fā)器為例，用撥碼開(kāi)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。 主從 JK 觸發(fā)器是在 主從 RS 觸發(fā)器 的基礎(chǔ)上組成的。 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