Synthesis of Sub-optimal RC Filters

摘要

In the design of filters, the main emphasis has been on the realization of ideal #x2018;brick wall#x2019; characteristics of normalized low pass filter. Many attempts in this direction were aimed to achieve LC filters being lossless. But now inductorless filters are becoming attractive because resistors and capacitors are comparatively cheaper, simpler and more close to ideal than inductors, particularly, where low frequencies are encountered. A major breakthrough in this direction has been after the advent of integrated circuits.