雙極性電(dian)(dian)源(yuan)是一種具有(you)正負兩(liang)個(ge)輸出(chu)端口(kou)的電(dian)(dian)源(yuan)，可以提(ti)(ti)供(gong)正電(dian)(dian)壓和負電(dian)(dian)壓兩(liang)種不同方向的電(dian)(dian)壓輸出(chu)。也稱為正負電(dian)(dian)源(yuan)。相對于(yu)單極性電(dian)(dian)源(yuan)而言(yan)，它(ta)可以提(ti)(ti)供(gong)正、負兩(liang)種電(dian)(dian)壓，這使得它(ta)在某(mou)些應用中更加靈活和方便。

　　雙(shuang)極(ji)性電(dian)(dian)(dian)(dian)源(yuan)通常由一(yi)(yi)個中(zhong)心(xin)點(dian)（地線）和(he)兩(liang)個電(dian)(dian)(dian)(dian)壓(ya)輸(shu)出端口組成，其中(zhong)中(zhong)心(xin)點(dian)為零電(dian)(dian)(dian)(dian)位，一(yi)(yi)側輸(shu)出正電(dian)(dian)(dian)(dian)壓(ya)，另一(yi)(yi)側輸(shu)出負電(dian)(dian)(dian)(dian)壓(ya)，使得電(dian)(dian)(dian)(dian)路系統能夠實現(xian)正負電(dian)(dian)(dian)(dian)源(yuan)的雙(shuang)向供(gong)電(dian)(dian)(dian)(dian)。雙(shuang)極(ji)性電(dian)(dian)(dian)(dian)源(yuan)廣泛(fan)應用(yong)于需要正負電(dian)(dian)(dian)(dian)壓(ya)的各種(zhong)電(dian)(dian)(dian)(dian)路和(he)設備中(zhong)，例如(ru)運放電(dian)(dian)(dian)(dian)路、放大器電(dian)(dian)(dian)(dian)路、模(mo)擬信(xin)號(hao)處理電(dian)(dian)(dian)(dian)路等(deng)。它(ta)可以通過使用(yong)交流電(dian)(dian)(dian)(dian)源(yuan)或(huo)直(zhi)流電(dian)(dian)(dian)(dian)源(yuan)等(deng)不同類型(xing)的電(dian)(dian)(dian)(dian)源(yuan)來(lai)供(gong)電(dian)(dian)(dian)(dian)，并且(qie)可以根據(ju)需要進行調節和(he)控(kong)制電(dian)(dian)(dian)(dian)壓(ya)輸(shu)出值和(he)穩定性。

圖：高壓功率放大器

　　雙(shuang)極性(xing)電(dian)(dian)源(yuan)能夠同(tong)時提供正負(fu)電(dian)(dian)壓輸出(chu)，使得(de)在一些(xie)需(xu)要正負(fu)電(dian)(dian)壓同(tong)時作(zuo)用(yong)的電(dian)(dian)路中(zhong)能夠實現更多的功能。比如(ru)，在音頻放大器(qi)中(zhong)，需(xu)要正電(dian)(dian)壓和負(fu)電(dian)(dian)壓分別作(zuo)用(yong)于(yu)兩(liang)端的輸出(chu)管，這就需(xu)要雙(shuang)極性(xing)電(dian)(dian)源(yuan)。同(tong)時，雙(shuang)極性(xing)電(dian)(dian)源(yuan)也可以用(yong)于(yu)一些(xie)需(xu)要正負(fu)電(dian)(dian)壓信(xin)(xin)號交替(ti)出(chu)現的實驗和測(ce)試中(zhong)，如(ru)電(dian)(dian)化(hua)學研究、信(xin)(xin)號發生器(qi)等。

　　在(zai)實(shi)際應(ying)用中，雙極(ji)性(xing)(xing)(xing)電(dian)源(yuan)(yuan)可(ke)(ke)以采用直流轉換器、變壓(ya)器等(deng)方式實(shi)現(xian)(xian)。值(zhi)得注意的(de)(de)(de)(de)是，雙極(ji)性(xing)(xing)(xing)電(dian)源(yuan)(yuan)輸(shu)(shu)(shu)出電(dian)壓(ya)一般情(qing)況下應(ying)該是對(dui)稱的(de)(de)(de)(de)，即正負電(dian)壓(ya)大小(xiao)相等(deng)，這(zhe)樣可(ke)(ke)以保證(zheng)輸(shu)(shu)(shu)出信號的(de)(de)(de)(de)穩定性(xing)(xing)(xing)和可(ke)(ke)靠性(xing)(xing)(xing)。為了實(shi)現(xian)(xian)雙極(ji)性(xing)(xing)(xing)電(dian)源(yuan)(yuan)的(de)(de)(de)(de)正負電(dian)壓(ya)對(dui)稱輸(shu)(shu)(shu)出，常用的(de)(de)(de)(de)方法是將單極(ji)性(xing)(xing)(xing)電(dian)源(yuan)(yuan)反(fan)向并聯連接。這(zhe)樣，原本的(de)(de)(de)(de)單極(ji)性(xing)(xing)(xing)電(dian)源(yuan)(yuan)輸(shu)(shu)(shu)出的(de)(de)(de)(de)正電(dian)壓(ya)與(yu)負電(dian)壓(ya)就可(ke)(ke)以通(tong)過(guo)反(fan)向連接得到相反(fan)極(ji)性(xing)(xing)(xing)的(de)(de)(de)(de)電(dian)壓(ya)輸(shu)(shu)(shu)出。

圖：ATA-4014高壓功率放大(da)器指(zhi)標參數

　　另外(wai)，還可(ke)以(yi)采用一些電(dian)(dian)(dian)(dian)路來實現雙(shuang)(shuang)極(ji)(ji)(ji)(ji)性電(dian)(dian)(dian)(dian)源的(de)(de)輸(shu)(shu)出，如(ru)基(ji)于運放的(de)(de)雙(shuang)(shuang)極(ji)(ji)(ji)(ji)性電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)路、基(ji)于變壓器(qi)的(de)(de)雙(shuang)(shuang)極(ji)(ji)(ji)(ji)性電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)路等(deng)。在(zai)實際應(ying)用中，雙(shuang)(shuang)極(ji)(ji)(ji)(ji)性電(dian)(dian)(dian)(dian)源的(de)(de)電(dian)(dian)(dian)(dian)壓輸(shu)(shu)出應(ying)該(gai)符合設定(ding)的(de)(de)要求(qiu)(qiu)，并且具(ju)有較(jiao)低的(de)(de)噪(zao)聲和(he)波動，以(yi)保證(zheng)其適用于各種電(dian)(dian)(dian)(dian)路和(he)實驗(yan)的(de)(de)需(xu)求(qiu)(qiu)。此(ci)外(wai)，雙(shuang)(shuang)極(ji)(ji)(ji)(ji)性電(dian)(dian)(dian)(dian)源還應(ying)具(ju)有較(jiao)高的(de)(de)可(ke)靠性和(he)穩定(ding)性，以(yi)保證(zheng)長時間運行不出現問題。

　　以上就(jiu)是雙極(ji)性(xing)電(dian)(dian)源是什么(me)意思的內容，雙極(ji)性(xing)電(dian)(dian)源在各種電(dian)(dian)路和實(shi)驗中(zhong)都(dou)有著廣泛的應用，是電(dian)(dian)子工(gong)程領域中(zhong)不可或缺的重要組成部分(fen)。

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