Back مرشح نشط Arabic Filtre actiu Catalan Ενεργά φίλτρα Greek Filtro activo Spanish فیلتر فعال Persian Filtre actif French ऐक्टिव फिल्टर Hindi Aktív szűrő Hungarian Filter aktif ID Filtro attivo Italian
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An active filter is a type of analog circuit implementing an electronic filter using active components, typically an amplifier. Amplifiers included in a filter design can be used to improve the cost, performance and predictability of a filter.[1]
An amplifier prevents the load impedance of the following stage from affecting the characteristics of the filter. An active filter can have complex poles and zeros without using a bulky or expensive inductor. The shape of the response, the Q (quality factor), and the tuned frequency can often be set with inexpensive variable resistors.[2] In some active filter circuits, one parameter can be adjusted without affecting the others.[1]
- ^ a b Don Lancaster, Active-Filter Cookbook, Howard W. Sams and Co., 1975 ISBN 0-672-21168-8 pages 8-10
- ^ "Op-amp Band Pass Filter". Basic Electronics Tutorials. 2013-08-14. Retrieved 2018-12-26.