貼片濾波器關于廣泛的物理概念是有用的，因為在電子技術的領域方面被的描述來說與各種物理的取值，隨時隨刻關注高低變化的進程。該行程經過各類傳感器的作用，被轉換為電壓或電流的時刻函數，稱之為各種物理量的時刻波形，或者稱之為信號。

濾波(bo)器是一種(zhong)選(xuan)頻(pin)(pin)設備，可以使(shi)信號定的(de)(de)頻(pin)(pin)率(lv)成分(fen)經過，而地(di)衰(shuai)減其他(ta)頻(pin)(pin)率(lv)成分(fen)。使(shi)用濾波(bo)器的(de)(de)這種(zhong)選(xuan)頻(pin)(pin)作用，可以濾除煩擾(rao)噪聲或進行(xing)頻(pin)(pin)譜剖析。換句(ju)話說，凡是可以使(shi)信號定的(de)(de)頻(pin)(pin)率(lv)成分(fen)經過，而地(di)衰(shuai)減或其他(ta)頻(pin)(pin)率(lv)成分(fen)的(de)(de)設備或體系都稱之(zhi)為(wei)濾波(bo)器。濾波(bo)器，是對(dui)波(bo)進行(xing)過濾的(de)(de)器件。

村田濾波器是(shi)由電(dian)(dian)(dian)(dian)(dian)(dian)容、電(dian)(dian)(dian)(dian)(dian)(dian)感和電(dian)(dian)(dian)(dian)(dian)(dian)阻組成的(de)(de)濾(lv)波(bo)電(dian)(dian)(dian)(dian)(dian)(dian)路。濾(lv)波(bo)器可(ke)以(yi)對電(dian)(dian)(dian)(dian)(dian)(dian)源線定(ding)(ding)頻(pin)(pin)(pin)(pin)(pin)(pin)率(lv)(lv)的(de)(de)頻(pin)(pin)(pin)(pin)(pin)(pin)點或(huo)(huo)(huo)該頻(pin)(pin)(pin)(pin)(pin)(pin)點以(yi)外的(de)(de)頻(pin)(pin)(pin)(pin)(pin)(pin)率(lv)(lv)進行(xing)(xing)有用濾(lv)除(chu)，得(de)到(dao)(dao)一(yi)(yi)個特(te)定(ding)(ding)頻(pin)(pin)(pin)(pin)(pin)(pin)率(lv)(lv)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)源信號，或(huo)(huo)(huo)一(yi)(yi)個特(te)定(ding)(ding)頻(pin)(pin)(pin)(pin)(pin)(pin)率(lv)(lv)后(hou)(hou)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)源信號。濾(lv)波(bo)器是(shi)由電(dian)(dian)(dian)(dian)(dian)(dian)容、電(dian)(dian)(dian)(dian)(dian)(dian)感和電(dian)(dian)(dian)(dian)(dian)(dian)阻組成的(de)(de)濾(lv)波(bo)電(dian)(dian)(dian)(dian)(dian)(dian)路。濾(lv)波(bo)器可(ke)以(yi)對電(dian)(dian)(dian)(dian)(dian)(dian)源線定(ding)(ding)頻(pin)(pin)(pin)(pin)(pin)(pin)率(lv)(lv)的(de)(de)頻(pin)(pin)(pin)(pin)(pin)(pin)點或(huo)(huo)(huo)該頻(pin)(pin)(pin)(pin)(pin)(pin)點以(yi)外的(de)(de)頻(pin)(pin)(pin)(pin)(pin)(pin)率(lv)(lv)進行(xing)(xing)有用濾(lv)除(chu)，得(de)到(dao)(dao)一(yi)(yi)個特(te)定(ding)(ding)頻(pin)(pin)(pin)(pin)(pin)(pin)率(lv)(lv)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)源信號，或(huo)(huo)(huo)一(yi)(yi)個特(te)定(ding)(ding)頻(pin)(pin)(pin)(pin)(pin)(pin)率(lv)(lv)后(hou)(hou)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)源信號。

信息來源：貼片濾波器，村田濾波器，村田貼片濾波器