July 2017
Beginner
484 pages
13h 26m
English
Content preview from Op Amps for Everyone, 5th Edition
(16.18)
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16.6. Band-Rejection Filter Design
A band-rejection filter is used to suppress a certain frequency rather than a range of frequencies.
Two of the most popular band-rejection filters are the active twin-T and the active Wien-Robinson circuit, both of which are second-order filters.
To generate the transfer function of a second-order band-rejection filter, replace the s term of a first-order low-pass response with the transformation in Eq. (16.18):
(16.18)which gives
(16.19)Thus the passband characteristic of the low-pass filter ...
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