How linear phase filters can still cause phase distortion
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eeNews Europe
Each time I sit down to write a Filter Wizard piece on this topic, I either get overwhelmed by the amount of writing effort needed to encapsulate it at reasonable length, or I get sidetracked by an interesting nugget found lurking, metaphorically speaking, behind the cushions of the sofa (the couch, to y’all in North America). So, this column covers just the latest nugget, not the essay on what happens to signals when you pass them through filters. For the moment, on the matter of filters and waveform distortion in general, I’ll just leave it at “well, what did you expect?” Filters inevitably change the phase and amplitude balance of frequency components in a signal.
Read the full article on page 39 of our October digital edition.
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