A Filter Summary
نویسنده
چکیده
This paper is in two parts. The first part contains a description of the conventional filter, which includes all filters in general use today. These filters when utilizing LC components date from the turn of the century, and from the 1920s using crystals, with improved analyses made later by Nyquist and others. There are some facts stated here which are not generally considered in all texts, or probably overlooked in communications work. The second part covers the special zero rise time and near zero group delay RF filters for Ultra Narrow Band methods.
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