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Published in:
2019 | OriginalPaper | Chapter
9. Passive Filters
Author : Afshin Izadian
Published in: Fundamentals of Modern Electric Circuit Analysis and Filter Synthesis
Publisher: Springer International Publishing
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Abstract
Frequency-selective circuits or “filters” are circuits that either pass or attenuate signals at a specific frequency or a range of desired frequencies. These filters can be implemented in hardware to be programmed in software that runs on a processor and can accomplish similar tasks. For instance, consider old cassette players, or video players, in which several set of filters are required to make the quality of sound or video expected from high-quality sets, whereas consider a modern MP3 player, or a digital satellite receiver, in which the same or even better quality of signal processing is expected, but the sets have no actual hardware to accomplish the signal filtration. In this chapter, both hardware circuits and methods to implement the filters in software are discussed.