双输入RC陷波滤波器概述

制作给定参数的微型化电感有很大的加工困难,从而迫使人们进行了大量的旨在用替代法获得频率选择特性的研究。努力方向有两个:试图发现能被用于频率选择的材料和元件的物理现象;试图设计出仅用有源器件、电阻、电容即可完成该功能的电路。

A Survey of Dual Input RC Notch Filters

Serious frabrication difficulties in producing microminiaturized inductances with therequired parameters have inspired considerable research effort directed towards obtaining fre-quency-selective Characteristics by alternative means. In general the effort has been made intwo main dierctions: attempts to discover physical phenomena in materials and devices whichcould be used for frequency selection; attempts to devise circuits which could perform thisfunction using only active devices, resistors and capacitors.