active filter
21Distributed element filter — Figure 1. A circuit featuring many of the f …
22Ceramic water filter — Ceramic water filters are an inexpensive and effective type of water filter, that rely on the small pore size of ceramic material to filter dirt, debris, and bacteria out of water. Contents 1 Method of action 2 Development and expansion 3 See… …
23Cherry Filter — 체리필터 Origin South Korea Genres Rock, alternative rock Years active 1997 present Labels CJ Music Web …
24Linkwitz-Riley filter — A Linkwitz Riley (L R) filter is an infinite impulse response filter used in Linkwitz Riley audio crossovers, named after its inventors Siegfried Linkwitz and Russ Riley, which was originally described in Passive Crossover Networks for… …
25Mechanical filter — Figure 1. A mechanical filter made by the Kokusai Electric Company intended for selecting the narrow 2 kHz bandwidth signals in SSB radio receivers. It operates at 455 kHz, a common IF for these receivers, and is dimensioned 45×15×15 mm ( …
26Butterworth filter — The Butterworth filter is one type of electronic filter design. It is designed to have a frequency response which is as flat as mathematically possible in the passband. Another name for them is maximally flat magnitude filters.The Butterworth… …
27Bayer filter — The Bayer arrangement of color filters on the pixel array of an image sensor …
28BioSand Filter — BioSand Water Filters are a technological adaptation of the centuries old slow sand filtration process. While implementations exist in many different sizes and varieties, the most common design is intended for use in rural homes where naturally… …
29Linkwitz-Riley-Filter — Ein Linkwitz Riley Filter (L R Filter) ist ein elektronischer Filter, welcher in Linkwitz Riley Frequenzweichen benutzt wird. Es ist nach seinen Erfindern Siegfried Linkwitz und Russ Riley benannt.[1] Es ist auch als Doppeltes Butterworth Filter… …
30Voltage-controlled filter — A voltage controlled filter (VCF) is an electronic filter whose operating characteristics can be controlled by means of a control voltage applied to one or more inputs. [citebook|title=Analog Days C: the invention and impact of the Moog… …
