電源(yuan)濾波(bo)器(qi)是由電容、電感(gan)和電阻組成的濾波(bo)電路。濾波(bo)器(qi)可(ke)以對電源(yuan)線(xian)中特(te)定(ding)頻(pin)(pin)(pin)率(lv)(lv)的頻(pin)(pin)(pin)點或該頻(pin)(pin)(pin)點以外的頻(pin)(pin)(pin)率(lv)(lv)進行有效濾除，得到一個(ge)特(te)定(ding)頻(pin)(pin)(pin)率(lv)(lv)的電源(yuan)信號，或消除一個(ge)特(te)定(ding)頻(pin)(pin)(pin)率(lv)(lv)后的電源(yuan)信號。

在實際應(ying)用中，要根(gen)據不同的用途選擇不同類型的電(dian)容器；第(di)二要考(kao)慮(lv)到電(dian)容器的標稱容量，允許誤差(cha)、耐壓(ya)值、漏電(dian)電(dian)阻(zu)等技(ji)術(shu)參數；第(di)三對(dui)于有(you)正、負極性(xing)的電(dian)解電(dian)容器來說，正、負極在焊(han)接時不要接反。

電(dian)容(rong)(rong)器(qi)(qi)以(yi)(yi)介質材料的(de)種類來看，可(ke)以(yi)(yi)分為鋁/鉭(tan)(tan)電(dian)解電(dian)容(rong)(rong)器(qi)(qi)、陶瓷(ci)電(dian)容(rong)(rong)器(qi)(qi)、薄膜電(dian)容(rong)(rong)器(qi)(qi)、紙介電(dian)容(rong)(rong)器(qi)(qi)、云母電(dian)容(rong)(rong)器(qi)(qi)等，其中鋁/鉭(tan)(tan)電(dian)解電(dian)容(rong)(rong)器(qi)(qi)、陶瓷(ci)電(dian)容(rong)(rong)器(qi)(qi)和薄膜電(dian)容(rong)(rong)器(qi)(qi)這三類約占電(dian)容(rong)(rong)器(qi)(qi)市場總(zong)量的(de)90%以(yi)(yi)上。陶瓷(ci)電(dian)容(rong)(rong)器(qi)(qi)具有微型化(hua)、耐(nai)高(gao)溫、超低損耗(hao)、低成本、絕緣電(dian)阻高(gao)、高(gao)耐(nai)壓和較好穩定性的(de)特點，但普通陶瓷(ci)電(dian)容(rong)(rong)器(qi)(qi)容(rong)(rong)量小...