narrow-bandwidth filter
1Filter (optics) — Coloured and Neutral Density filters Optical filters are devices which selectively transmit light of different wavelengths, usually implemented as plane glass or plastic devices in the optical path which are either dyed in the mass or have… …
2Quadrature filter — In signal processing, a quadrature filter q(t) is the analytic representation of the impulse response f(t) of a real valued filter::q(t) = f {a}(t) = left(delta(t) + {i over pi t} ight) * f(t)If the quadrature filter q(t) is applied to a signal… …
3Mechanical 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 ( …
4Weighting filter — A weighting filter is used to emphasise or suppress some aspects of a phenomenon compared to others, for measurement or other purposes. Contents 1 Audio application …
5Distributed element filter — Figure 1. A circuit featuring many of the f …
6Electronic filter — Electronic filters are electronic circuits which perform signal processing functions, specifically intended to remove unwanted signal components and/or enhance wanted ones. Electronic filters can be:*passive or active *analog or digital *discrete …
7Raised-cosine filter — The raised cosine filter is a particular electronic filter, frequently used for pulse shaping in digital modulation due to its ability to minimise intersymbol interference (ISI). Its name stems from the fact that the non zero portion of the… …
8Atomic line filter — A potassium Faraday filter designed, built and photographed by Jonas Hedin for making daytime LIDAR measurements at Arecibo Observatory.[1] An atomic line filter (ALF) is an advanced optical band pass filter used in the physical sciences for… …
9Band-pass filter — A band pass filter is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range. An example of an analogue electronic band pass filter is an RLC circuit (a resistor–inductor–capacitor circuit) …
10Linear filter — A linear filter applies a linear operator to a time varying input signal. Linear filters are very common in electronics and digital signal processing (see the article on electronic filters), but they can also be found in mechanical engineering… …
