A Signal Filter is a passive component, which allows specific frequency bands to pass and reject other electrical signals, mainly for noise reduction. The design integrates multilayer ceramic capacitors, inductors, dielectric resonators and crystals. The Filter finds use in circuits of audio, video, broadband and communication equipment. Electronic signal processing filter is described to be linear or non-linear, analogue or digital, shift invariance, passive or active circuit.
The filter frequency response can be classified as:
high-pass
low-pass
band-pass
band-stop
notch
all-pass filter
cut-off frequency.
The order of a filter refers to the slope of the transition to roll-off around the cut-off frequency. A first-order filter responds at -6 dB per octave, a second-order filter decreases at -12 dB, a third-order at -18 dB, on a logarithmic scale. The analogue filter in a linear design of a network synthesis type is known as the Butterworth filter, Chebyshev filter, Elliptic filter, Bessel filter and Gaussian filter.
Description:
Wurth WE-CNSW common mode filters offer high common
mode suppression at high frequency and the winding symmetry provides small influence on high speed signals. Offered with a range of rated currents and impedance values, suitable applications for these common mode ...
Description:
Ceramic dielectric RFI suppression filters that combine two
reactive filtering elements, a miniature discoidal capacitor and ferrite inductorThe filters are encapsulated in a brass case and are intended for chassis mounting applications where space is at a premiumIdeally suited to ...
Description:
From RS Pro, this range consists of PI-section
RFI suppression filters that combine tubular capacitors with a ferrite inductor. These passive filters are suitable for applications where high insertion loss is required from 10 MHz to 10 GHz along with ...
Description:
NFA 21SL series 0805 SMT chip EMI Suppression
Filters for Applications using Murata Ceramic processing technology and filter design technology. These filters prevent ringing caused by circuit impedance, the arrays stable noise attenuation over wide frequency range and are small ...
