TABLE OF CONTENTS To make communication systems, radar systems, and the like work, we need filters and attenuators. Filters are basic electronic building blocks that are passive and active, analog and digital. They basically allow us to condition electrical signals in order to accomplish the elements of most of our complex electrical systems in use today.
Active filters have led to the elimination of elements that prohibited miniaturization. Active filters easily fit into today s microcircuits and systems.
Digital filters represent a class of filters that do not have the limitations of analog filters. Although they require much care and attention in how they are designed and how they will be used, they most certainly have given us a significantly larger set of applications some of which could never be handled by analog filters. Because of the nature of digital filters, we need to fully understand the problems with phase.
In this section we look at the basic principles behind all of these filters. In Chap. 10.7, we look at attenuators that are used in matching impedances, critical in high-frequency systems. C.A.
In This Section:
Section References and Bibliography:
1. Ruston, H., and J. Bordogna, Electric Networks: Functions, Filters, Analysis, McGraw-Hill, 1966.
2. Darlington, S., Synthesis of reactance 4-poles which produce prescribed insertion loss characteristics, including special applications to filter...
