Integratable active RC four:pole filter - is for communications and has isolation amplifiers separating networks to simplify design

摘要

The integratable active RC four-pole filter, for communications and data processing etc., consists of two or more passive RC networks connected as a chain whose elements are separated by operational amplifiers. - The operational amplifiers actas isolation amplifiers. The RC networks may be identical or different. The use of these amplifiers allows the filter to be constructed more simply and simplifies network analysis. The first RC network has a resistor (R1) in the longitudinal line of the circuits, a capacitor (C1) in the transverse direction and another resistor (R1') in the feedback line between the first pair of adjacent stages (N1,N0).