Article
Article
Electric filter
Article By:
Havens, Donald P. Filter Products, Rockwell International Corporation, Costa Mesa, California.
Huelsman, Lawrence P. Department of Electrical and Computer Engineering, College of Engineering and Mines, The University of Arizona, Tucson, Arizona.
Last reviewed:January 2020
DOI:https://doi.org/10.1036/1097-8542.216100
A transmission network used to selectively modify the components of a signal according to their frequencies. In most cases a filter is used to enhance signals of desired frequencies while suppressing signals of undesired frequencies. An ideal filter would pass only desired frequencies while completely suppressing all unwanted frequencies, without any dispersion in time of the frequencies. Unfortunately, ideal filters are impossible to achieve.
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