怎么判斷濾波器高通和低通？高通濾波器和低通濾波器區別是高通濾波器是允許信號中的高頻或者交流分量通過，抑制低頻或者直流分量的濾波器。而低通濾波器是允許信號中的低頻或者直流分量通過，抑制高頻分量或者干擾和噪音的濾波器。因此總體來講就是低通濾波器是保留小于截止頻率信號的，而高通的濾波器則是保留大于截止頻率信號的。

電(dian)感阻止高頻信(xin)號通(tong)過而允許低頻信(xin)號通(tong)過，電(dian)容的特性卻相反。

低通(tong)(tong)(tong)濾波器(qi)原理很簡單(dan)，它(ta)就是(shi)利(li)(li)用電(dian)(dian)(dian)(dian)容(rong)通(tong)(tong)(tong)高頻阻(zu)低頻、電(dian)(dian)(dian)(dian)感(gan)通(tong)(tong)(tong)低頻阻(zu)高頻的(de)原理。對于(yu)(yu)需(xu)要截止的(de)高頻，利(li)(li)用電(dian)(dian)(dian)(dian)容(rong)吸收電(dian)(dian)(dian)(dian)感(gan)阻(zu)礙(ai)的(de)方(fang)法不使(shi)它(ta)通(tong)(tong)(tong)過(guo)；對于(yu)(yu)需(xu)要放行的(de)低頻，利(li)(li)用電(dian)(dian)(dian)(dian)容(rong)高阻(zu)、電(dian)(dian)(dian)(dian)感(gan)低阻(zu)的(de)特點(dian)讓它(ta)通(tong)(tong)(tong)過(guo)。

文章源自：村田濾波器，村田電源濾波器(qi)，村田濾波器(qi)代(dai)理商