二(er)極(ji)(ji)管(guan)(guan)控(kong)制(zhi)(zhi)電(dian)(dian)(dian)(dian)路及(ji)(ji)故(gu)障(zhang)處理(li)二(er)極(ji)(ji)管(guan)(guan)導通(tong)之后，它的(de)(de)(de)(de)正(zheng)向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)阻(zu)大小(xiao)隨(sui)電(dian)(dian)(dian)(dian)流(liu)大小(xiao)變(bian)化(hua)而(er)(er)有微(wei)小(xiao)改變(bian)，正(zheng)向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)愈大，正(zheng)向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)阻(zu)愈小(xiao)；反(fan)之則(ze)大。利用二(er)極(ji)(ji)管(guan)(guan)正(zheng)向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)與(yu)正(zheng)向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)阻(zu)之間的(de)(de)(de)(de)特(te)性(xing)(xing)，可以構(gou)(gou)成(cheng)(cheng)一些(xie)自(zi)(zi)動(dong)(dong)(dong)控(kong)制(zhi)(zhi)電(dian)(dian)(dian)(dian)路。如圖9-43所示是(shi)一種由二(er)極(ji)(ji)管(guan)(guan)構(gou)(gou)成(cheng)(cheng)的(de)(de)(de)(de)自(zi)(zi)動(dong)(dong)(dong)控(kong)制(zhi)(zhi)電(dian)(dian)(dian)(dian)路，又稱ALC電(dian)(dian)(dian)(dian)路（自(zi)(zi)動(dong)(dong)(dong)電(dian)(dian)(dian)(dian)平(ping)控(kong)制(zhi)(zhi)電(dian)(dian)(dian)(dian)路），它在(zai)磁(ci)(ci)性(xing)(xing)錄(lu)音設備(bei)中（如卡座(zuo)(zuo)）的(de)(de)(de)(de)錄(lu)音電(dian)(dian)(dian)(dian)路中經常應(ying)用。二(er)極(ji)(ji)管(guan)(guan)控(kong)制(zhi)(zhi)電(dian)(dian)(dian)(dian)路及(ji)(ji)故(gu)障(zhang)處理(li)二(er)極(ji)(ji)管(guan)(guan)導通(tong)之后，它的(de)(de)(de)(de)正(zheng)向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)阻(zu)大小(xiao)隨(sui)電(dian)(dian)(dian)(dian)流(liu)大小(xiao)變(bian)化(hua)而(er)(er)有微(wei)小(xiao)改變(bian)，正(zheng)向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)愈大，正(zheng)向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)阻(zu)愈小(xiao)；反(fan)之則(ze)大。利用二(er)極(ji)(ji)管(guan)(guan)正(zheng)向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)與(yu)正(zheng)向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)阻(zu)之間的(de)(de)(de)(de)特(te)性(xing)(xing)，可以構(gou)(gou)成(cheng)(cheng)一些(xie)自(zi)(zi)動(dong)(dong)(dong)控(kong)制(zhi)(zhi)電(dian)(dian)(dian)(dian)路。如圖9-43所示是(shi)一種由二(er)極(ji)(ji)管(guan)(guan)構(gou)(gou)成(cheng)(cheng)的(de)(de)(de)(de)自(zi)(zi)動(dong)(dong)(dong)控(kong)制(zhi)(zhi)電(dian)(dian)(dian)(dian)路，又稱ALC電(dian)(dian)(dian)(dian)路（自(zi)(zi)動(dong)(dong)(dong)電(dian)(dian)(dian)(dian)平(ping)控(kong)制(zhi)(zhi)電(dian)(dian)(dian)(dian)路），它在(zai)磁(ci)(ci)性(xing)(xing)錄(lu)音設備(bei)中（如卡座(zuo)(zuo)）的(de)(de)(de)(de)錄(lu)音電(dian)(dian)(dian)(dian)路中經常應(ying)用。西藏ESD二(er)極(ji)(ji)管(guan)(guan)廠(chang)家(jia)就找成(cheng)(cheng)都長(chang)九(jiu)電(dian)(dian)(dian)(dian)子(zi)科(ke)技有限公司。二(er)極(ji)(ji)管(guan)(guan)總代理(li)

二(er)(er)(er)極(ji)(ji)(ji)(ji)管(guan)(guan)(guan)能(neng)夠穩定直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)原理說明電(dian)(dian)(dian)(dian)(dian)(dian)路中，3只(zhi)(zhi)二(er)(er)(er)極(ji)(ji)(ji)(ji)管(guan)(guan)(guan)在直(zhi)(zhi)流(liu)(liu)工(gong)作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)的(de)正向(xiang)偏置作(zuo)用(yong)下導(dao)通(tong)(tong)(tong)，導(dao)通(tong)(tong)(tong)后(hou)對這(zhe)一電(dian)(dian)(dian)(dian)(dian)(dian)路的(de)作(zuo)用(yong)是穩定了電(dian)(dian)(dian)(dian)(dian)(dian)路中A點(dian)的(de)直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)。眾(zhong)所(suo)周(zhou)知，二(er)(er)(er)極(ji)(ji)(ji)(ji)管(guan)(guan)(guan)內部是一個PN結的(de)結構，PN結除單向(xiang)導(dao)電(dian)(dian)(dian)(dian)(dian)(dian)特(te)(te)性(xing)之外還有(you)許多特(te)(te)性(xing)，其(qi)中之一是二(er)(er)(er)極(ji)(ji)(ji)(ji)管(guan)(guan)(guan)導(dao)通(tong)(tong)(tong)后(hou)其(qi)管(guan)(guan)(guan)壓(ya)降(jiang)基(ji)本不變，對于常用(yong)的(de)硅二(er)(er)(er)極(ji)(ji)(ji)(ji)管(guan)(guan)(guan)而言導(dao)通(tong)(tong)(tong)后(hou)正極(ji)(ji)(ji)(ji)與負(fu)極(ji)(ji)(ji)(ji)之間的(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)降(jiang)為0.6V。根(gen)據(ju)二(er)(er)(er)極(ji)(ji)(ji)(ji)管(guan)(guan)(guan)的(de)這(zhe)一特(te)(te)性(xing)，可以很方(fang)便地分析由普通(tong)(tong)(tong)二(er)(er)(er)極(ji)(ji)(ji)(ji)管(guan)(guan)(guan)構成(cheng)的(de)簡易直(zhi)(zhi)流(liu)(liu)穩壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)路工(gong)作(zuo)原理。3只(zhi)(zhi)二(er)(er)(er)極(ji)(ji)(ji)(ji)管(guan)(guan)(guan)導(dao)通(tong)(tong)(tong)之后(hou)，每只(zhi)(zhi)二(er)(er)(er)極(ji)(ji)(ji)(ji)管(guan)(guan)(guan)的(de)管(guan)(guan)(guan)壓(ya)降(jiang)是0.6V，那么3只(zhi)(zhi)串聯(lian)之后(hou)的(de)直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)降(jiang)是0.6×3=1.8V。四(si)川(chuan)ESD靜電(dian)(dian)(dian)(dian)(dian)(dian)保護二(er)(er)(er)極(ji)(ji)(ji)(ji)管(guan)(guan)(guan)代理西藏二(er)(er)(er)極(ji)(ji)(ji)(ji)管(guan)(guan)(guan)廠(chang)家就找成(cheng)都長(chang)九電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)科技有(you)限(xian)公司。

二(er)極(ji)(ji)管(guan)是一(yi)種(zhong)(zhong)(zhong)(zhong)(zhong)半導體(ti)器(qi)件(jian)，具有單(dan)向(xiang)(xiang)導電(dian)(dian)性能。它(ta)(ta)適(shi)用(yong)于各(ge)(ge)種(zhong)(zhong)(zhong)(zhong)(zhong)電(dian)(dian)子(zi)電(dian)(dian)路(lu)(lu)中(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)整流(liu)、穩(wen)(wen)壓、開關等功能，是電(dian)(dian)子(zi)工業中(zhong)(zhong)(zhong)(zhong)不(bu)可(ke)(ke)或(huo)缺的(de)(de)(de)重要組成部分。二(er)極(ji)(ji)管(guan)適(shi)用(yong)于各(ge)(ge)種(zhong)(zhong)(zhong)(zhong)(zhong)電(dian)(dian)源電(dian)(dian)路(lu)(lu)中(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)整流(liu)和(he)(he)濾(lv)波(bo)功能。它(ta)(ta)可(ke)(ke)以(yi)將交流(liu)電(dian)(dian)轉換為(wei)(wei)直流(liu)電(dian)(dian)，并通(tong)(tong)(tong)過(guo)(guo)濾(lv)波(bo)電(dian)(dian)路(lu)(lu)去除電(dian)(dian)源中(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)雜波(bo)和(he)(he)噪聲，為(wei)(wei)后續電(dian)(dian)路(lu)(lu)提(ti)(ti)供穩(wen)(wen)定(ding)的(de)(de)(de)電(dian)(dian)源。二(er)極(ji)(ji)管(guan)適(shi)用(yong)于各(ge)(ge)種(zhong)(zhong)(zhong)(zhong)(zhong)電(dian)(dian)子(zi)設(she)備(bei)中(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)穩(wen)(wen)壓功能。它(ta)(ta)可(ke)(ke)以(yi)通(tong)(tong)(tong)過(guo)(guo)反向(xiang)(xiang)擊穿的(de)(de)(de)方(fang)式(shi)，將電(dian)(dian)壓穩(wen)(wen)定(ding)在(zai)一(yi)定(ding)范圍(wei)內，保(bao)(bao)證電(dian)(dian)路(lu)(lu)的(de)(de)(de)正常(chang)工作(zuo)和(he)(he)穩(wen)(wen)定(ding)性。二(er)極(ji)(ji)管(guan)適(shi)用(yong)于各(ge)(ge)種(zhong)(zhong)(zhong)(zhong)(zhong)電(dian)(dian)子(zi)設(she)備(bei)中(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)開關功能。它(ta)(ta)可(ke)(ke)以(yi)通(tong)(tong)(tong)過(guo)(guo)正向(xiang)(xiang)導通(tong)(tong)(tong)和(he)(he)反向(xiang)(xiang)截止的(de)(de)(de)方(fang)式(shi)，實現電(dian)(dian)路(lu)(lu)的(de)(de)(de)開關控制(zhi)，為(wei)(wei)電(dian)(dian)子(zi)設(she)備(bei)提(ti)(ti)供靈(ling)活的(de)(de)(de)控制(zhi)和(he)(he)調節功能。二(er)極(ji)(ji)管(guan)適(shi)用(yong)于各(ge)(ge)種(zhong)(zhong)(zhong)(zhong)(zhong)光電(dian)(dian)器(qi)件(jian)中(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)檢測和(he)(he)轉換功能。它(ta)(ta)可(ke)(ke)以(yi)將光信(xin)(xin)號(hao)轉換為(wei)(wei)電(dian)(dian)信(xin)(xin)號(hao)，并通(tong)(tong)(tong)過(guo)(guo)電(dian)(dian)路(lu)(lu)進行檢測和(he)(he)處理，為(wei)(wei)光電(dian)(dian)器(qi)件(jian)的(de)(de)(de)應用(yong)提(ti)(ti)供重要的(de)(de)(de)支(zhi)持和(he)(he)保(bao)(bao)障。二(er)極(ji)(ji)管(guan)適(shi)用(yong)于各(ge)(ge)種(zhong)(zhong)(zhong)(zhong)(zhong)通(tong)(tong)(tong)信(xin)(xin)設(she)備(bei)中(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)信(xin)(xin)號(hao)處理和(he)(he)調制(zhi)功能。它(ta)(ta)可(ke)(ke)以(yi)通(tong)(tong)(tong)過(guo)(guo)正向(xiang)(xiang)導通(tong)(tong)(tong)和(he)(he)反向(xiang)(xiang)截止的(de)(de)(de)方(fang)式(shi)，實現信(xin)(xin)號(hao)的(de)(de)(de)調制(zhi)和(he)(he)解調，為(wei)(wei)通(tong)(tong)(tong)信(xin)(xin)設(she)備(bei)的(de)(de)(de)應用(yong)提(ti)(ti)供重要的(de)(de)(de)支(zhi)持和(he)(he)保(bao)(bao)障。

電(dian)路(lu)工(gong)(gong)作(zuo)原(yuan)理分(fen)析思路(lu)說明關(guan)于這(zhe)(zhe)一(yi)電(dian)路(lu)工(gong)(gong)作(zuo)原(yuan)理的(de)(de)(de)(de)分(fen)析思路(lu)主要(yao)說明下列幾點：（1）如果沒(mei)有(you)(you)VD1這(zhe)(zhe)一(yi)支(zhi)路(lu)，從(cong)(cong)級(ji)錄(lu)音(yin)(yin)放(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)輸出(chu)(chu)的(de)(de)(de)(de)錄(lu)音(yin)(yin)信(xin)(xin)號(hao)(hao)(hao)全部(bu)加到(dao)第二級(ji)錄(lu)音(yin)(yin)放(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)中(zhong)。但是(shi)(shi)，有(you)(you)了VD1這(zhe)(zhe)一(yi)支(zhi)路(lu)之(zhi)后，從(cong)(cong)級(ji)錄(lu)音(yin)(yin)放(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)輸出(chu)(chu)的(de)(de)(de)(de)錄(lu)音(yin)(yin)信(xin)(xin)號(hao)(hao)(hao)有(you)(you)可能會經過C1和導(dao)通(tong)(tong)的(de)(de)(de)(de)VD1流(liu)(liu)到(dao)地(di)端，形成對錄(lu)音(yin)(yin)信(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)(de)分(fen)流(liu)(liu)衰減。（2）電(dian)路(lu)分(fen)析的(de)(de)(de)(de)第二個關(guan)鍵是(shi)(shi)VD1這(zhe)(zhe)一(yi)支(zhi)路(lu)對級(ji)錄(lu)音(yin)(yin)放(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)輸出(chu)(chu)信(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)(de)對地(di)分(fen)流(liu)(liu)衰減的(de)(de)(de)(de)具體情(qing)況(kuang)。顯(xian)然，支(zhi)路(lu)中(zhong)的(de)(de)(de)(de)電(dian)容(rong)(rong)(rong)C1是(shi)(shi)一(yi)只容(rong)(rong)(rong)量(liang)較大(da)(da)(da)(da)的(de)(de)(de)(de)電(dian)容(rong)(rong)(rong)（C1電(dian)路(lu)符號(hao)(hao)(hao)中(zhong)標出(chu)(chu)極性，說明C1是(shi)(shi)電(dian)解電(dian)容(rong)(rong)(rong)，而電(dian)解電(dian)容(rong)(rong)(rong)的(de)(de)(de)(de)容(rong)(rong)(rong)量(liang)較大(da)(da)(da)(da)），所以(yi)C1對錄(lu)音(yin)(yin)信(xin)(xin)號(hao)(hao)(hao)呈通(tong)(tong)路(lu)，說明這(zhe)(zhe)一(yi)支(zhi)路(lu)中(zhong)VD1是(shi)(shi)對錄(lu)音(yin)(yin)信(xin)(xin)號(hao)(hao)(hao)進行分(fen)流(liu)(liu)衰減的(de)(de)(de)(de)關(guan)鍵元器(qi)(qi)件(jian)。（3）從(cong)(cong)分(fen)流(liu)(liu)支(zhi)路(lu)電(dian)路(lu)分(fen)析中(zhong)要(yao)明白一(yi)點：從(cong)(cong)級(ji)錄(lu)音(yin)(yin)放(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)輸出(chu)(chu)的(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)(hao)，如果從(cong)(cong)VD1支(zhi)路(lu)分(fen)流(liu)(liu)得多，那(nei)么流(liu)(liu)入第二級(ji)錄(lu)音(yin)(yin)放(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)的(de)(de)(de)(de)錄(lu)音(yin)(yin)信(xin)(xin)號(hao)(hao)(hao)就小，反(fan)之(zhi)則(ze)大(da)(da)(da)(da)。（4）VD1存在(zai)(zai)導(dao)通(tong)(tong)與截(jie)止(zhi)兩種情(qing)況(kuang)，在(zai)(zai)VD1截(jie)止(zhi)時對錄(lu)音(yin)(yin)信(xin)(xin)號(hao)(hao)(hao)無(wu)分(fen)流(liu)(liu)作(zuo)用，在(zai)(zai)導(dao)通(tong)(tong)時則(ze)對錄(lu)音(yin)(yin)信(xin)(xin)號(hao)(hao)(hao)進行分(fen)流(liu)(liu)。（5）在(zai)(zai)VD1正極上接有(you)(you)電(dian)阻R1，它給VD1一(yi)個控制電(dian)壓(ya)，顯(xian)然這(zhe)(zhe)個電(dian)壓(ya)控制著VD1導(dao)通(tong)(tong)或截(jie)止(zhi)。所以(yi)，R1送來的(de)(de)(de)(de)電(dian)壓(ya)是(shi)(shi)分(fen)析VD1導(dao)通(tong)(tong)、截(jie)止(zhi)的(de)(de)(de)(de)關(guan)鍵所在(zai)(zai)。分(fen)析這(zhe)(zhe)個電(dian)路(lu)比較大(da)(da)(da)(da)的(de)(de)(de)(de)困難是(shi)(shi)在(zai)(zai)VD1導(dao)通(tong)(tong)后。車規二極管廠(chang)家就找成都長九電(dian)子科技有(you)(you)限公司。

故(gu)障檢(jian)測(ce)方法檢(jian)測(ce)這(zhe)一(yi)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中的(de)3只(zhi)(zhi)二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)為有效(xiao)的(de)方法是(shi)(shi)(shi)測(ce)量二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)上的(de)直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)壓，如圖9-41所(suo)示(shi)(shi)是(shi)(shi)(shi)測(ce)量時接線(xian)示(shi)(shi)意圖。如果(guo)(guo)測(ce)量直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)壓結果(guo)(guo)是(shi)(shi)(shi)1.8V左右，說明3只(zhi)(zhi)二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)工(gong)作正常；如果(guo)(guo)測(ce)量直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)壓結果(guo)(guo)是(shi)(shi)(shi)0V，要(yao)(yao)(yao)測(ce)量直(zhi)(zhi)流(liu)工(gong)作電(dian)(dian)(dian)(dian)(dian)壓+V是(shi)(shi)(shi)否正常和(he)電(dian)(dian)(dian)(dian)(dian)阻R1是(shi)(shi)(shi)否開(kai)路(lu)(lu)，與(yu)3只(zhi)(zhi)二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)無關，因為3只(zhi)(zhi)二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)同時擊穿的(de)可(ke)能性(xing)(xing)較小；如果(guo)(guo)測(ce)量直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)壓結果(guo)(guo)大(da)于(yu)1.8V，檢(jian)查3只(zhi)(zhi)二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)中有一(yi)只(zhi)(zhi)開(kai)路(lu)(lu)故(gu)障。電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)分(fen)(fen)析(xi)(xi)細(xi)節說明關于(yu)上述二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)簡易直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)壓穩(wen)壓電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)分(fen)(fen)析(xi)(xi)細(xi)節說明如下。（1）在電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)分(fen)(fen)析(xi)(xi)中，利用(yong)二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)的(de)單(dan)向(xiang)導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)(dian)性(xing)(xing)可(ke)以(yi)知道二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)處于(yu)導(dao)(dao)(dao)通狀態，但是(shi)(shi)(shi)并不能說明這(zhe)幾(ji)只(zhi)(zhi)二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)導(dao)(dao)(dao)通后對電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)有什么(me)具(ju)體(ti)作用(yong)，所(suo)以(yi)只(zhi)(zhi)利用(yong)單(dan)向(xiang)導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)(dian)特(te)(te)(te)性(xing)(xing)還不能夠正確(que)分(fen)(fen)析(xi)(xi)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)工(gong)作原理(li)。（2）二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)眾多的(de)特(te)(te)(te)性(xing)(xing)中只(zhi)(zhi)有導(dao)(dao)(dao)通后管(guan)(guan)(guan)(guan)壓降基本不變這(zhe)一(yi)特(te)(te)(te)性(xing)(xing)能夠為合(he)理(li)地解釋這(zhe)一(yi)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的(de)作用(yong)，所(suo)以(yi)依(yi)據(ju)這(zhe)一(yi)點(dian)可(ke)以(yi)確(que)定這(zhe)一(yi)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)是(shi)(shi)(shi)為了穩(wen)定電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中A點(dian)的(de)直(zhi)(zhi)流(liu)工(gong)作電(dian)(dian)(dian)(dian)(dian)壓。（3）電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中有多只(zhi)(zhi)元器件時，一(yi)定要(yao)(yao)(yao)設法搞清(qing)楚實現電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)功能的(de)主(zhu)要(yao)(yao)(yao)元器件，然后圍繞它進行(xing)展(zhan)開(kai)分(fen)(fen)析(xi)(xi)。分(fen)(fen)析(xi)(xi)中運用(yong)該元器件主(zhu)要(yao)(yao)(yao)特(te)(te)(te)性(xing)(xing)，進行(xing)合(he)理(li)解釋。貴州防雷(lei)二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)廠家就找成都長九電(dian)(dian)(dian)(dian)(dian)子科技有限(xian)公司。四川(chuan)ESD靜電(dian)(dian)(dian)(dian)(dian)保護二(er)(er)(er)(er)(er)極(ji)管(guan)(guan)(guan)(guan)代理(li)

云南ESD靜電保(bao)護二極管(guan)廠家(jia)就找(zhao)成都長九電子科技有(you)限公(gong)司。二極管(guan)總代理(li)

二(er)極(ji)管(guan)(guan)工(gong)作(zuo)原(yuan)(yuan)(yuan)理(li)（正向(xiang)(xiang)導(dao)電(dian)，反(fan)(fan)向(xiang)(xiang)不(bu)(bu)導(dao)電(dian)）晶(jing)體(ti)二(er)極(ji)管(guan)(guan)是一個由p型(xing)半導(dao)體(ti)和(he)n型(xing)半導(dao)體(ti)形成的(de)(de)p-n結(jie)，在其(qi)界面處兩(liang)側(ce)形成了(le)空(kong)間(jian)電(dian)荷層，并且建有自(zi)建電(dian)場，當不(bu)(bu)存在外(wai)加電(dian)壓(ya)(ya)(ya)時，因(yin)為(wei)p-n結(jie)兩(liang)邊(bian)載(zai)流(liu)(liu)子(zi)濃(nong)度(du)(du)差引起的(de)(de)擴散電(dian)流(liu)(liu)和(he)自(zi)建電(dian)場引起的(de)(de)漂移電(dian)流(liu)(liu)相等而處于電(dian)平(ping)衡狀態。當產生正向(xiang)(xiang)電(dian)壓(ya)(ya)(ya)偏(pian)置(zhi)時，外(wai)界電(dian)場與自(zi)建電(dian)場的(de)(de)互相抑消作(zuo)用使載(zai)流(liu)(liu)子(zi)的(de)(de)擴散電(dian)流(liu)(liu)增(zeng)加引起了(le)正向(xiang)(xiang)電(dian)流(liu)(liu)（也(ye)就(jiu)是導(dao)電(dian)的(de)(de)原(yuan)(yuan)(yuan)因(yin)）。當產生反(fan)(fan)向(xiang)(xiang)電(dian)壓(ya)(ya)(ya)偏(pian)置(zhi)時，外(wai)界電(dian)場與自(zi)建電(dian)場進(jin)一步(bu)加強，形成在一定反(fan)(fan)向(xiang)(xiang)電(dian)壓(ya)(ya)(ya)范圍中(zhong)與反(fan)(fan)向(xiang)(xiang)偏(pian)置(zhi)電(dian)壓(ya)(ya)(ya)值(zhi)無(wu)關的(de)(de)反(fan)(fan)向(xiang)(xiang)飽(bao)和(he)電(dian)流(liu)(liu)I0（這也(ye)就(jiu)是不(bu)(bu)導(dao)電(dian)的(de)(de)原(yuan)(yuan)(yuan)因(yin)）。當外(wai)加的(de)(de)反(fan)(fan)向(xiang)(xiang)電(dian)壓(ya)(ya)(ya)高到(dao)一定程(cheng)度(du)(du)時，p-n結(jie)空(kong)間(jian)電(dian)荷層中(zhong)的(de)(de)電(dian)場強度(du)(du)達到(dao)臨界值(zhi)產生載(zai)流(liu)(liu)子(zi)的(de)(de)倍增(zeng)過程(cheng)，產生大(da)量電(dian)子(zi)空(kong)穴(xue)對，產生了(le)數值(zhi)很(hen)大(da)的(de)(de)反(fan)(fan)向(xiang)(xiang)擊穿(chuan)電(dian)流(liu)(liu)，稱為(wei)二(er)極(ji)管(guan)(guan)的(de)(de)擊穿(chuan)現象。二(er)極(ji)管(guan)(guan)總代理(li)

本文(wen)來自沈陽喜(xi)納多采暖工程有(you)限公司(si)：//zjlong.cn/Article/77b399893.html