All-pass filter
From Wikipedia, the free encyclopedia
An all-pass filter is an electronic filter that passes all frequencies equally, but changes the phase relationship between various frequencies. It does this by varying its propagation delay with frequency. Generally, the filter is described by the frequency at which the phase shift crosses 90°.
They are generally used to compensate for other undesired phase shifts that arise in the system.
[edit] See also
- All-pass transform
- Hilbert transform
- High-pass filter
- Low-pass filter
- Band-stop filter
- Band-pass filter
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ru:Фазовый фильтр
