SettingsFilter theory
Alpha beta filter
An alpha beta filter is a simplified form of observer for estimation, data smoothing and control applications.
An alpha beta filter is a simplified form of observer for estimation, data smoothing and control applications.
Anti-causal filter
In signal processing, an anti-causal system is one whose output depends only on present and future inputs.
In signal processing, an anti-causal system is one whose output depends only on present and future inputs.
Antimetric (electrical networks)
An antimetric electrical network is one that exhibits anti-symmetrical electrical properties.
An antimetric electrical network is one that exhibits anti-symmetrical electrical properties.
Bartlett's bisection theorem
Bartlett's Bisection Theorem is an electrical theorem in network analysis due to Albert Charles Bartlett.
Bartlett's Bisection Theorem is an electrical theorem in network analysis due to Albert Charles Bartlett.
Boucherot cell
A boucherot cell (or Zobel network) is an electronic filter, used in audio amplifiers to damp high frequency oscillations that might occur in the absence of loads at high frequencies.
A boucherot cell (or Zobel network) is an electronic filter, used in audio amplifiers to damp high frequency oscillations that might occur in the absence of loads at high frequencies.
Comb filter
In signal processing, a comb filter adds a delayed version of a signal to itself, causing constructive and destructive interference.
In signal processing, a comb filter adds a delayed version of a signal to itself, causing constructive and destructive interference.
Composite image filter
A composite image filter is an electronic filter consisting of multiple image filter sections of two or more different types.
A composite image filter is an electronic filter consisting of multiple image filter sections of two or more different types.
Cutoff frequency
In physics and electrical engineering, a cutoff frequency, corner frequency, or break frequency is a boundary in a system's frequency response at which energy flowing through the sys...
In physics and electrical engineering, a cutoff frequency, corner frequency, or break frequency is a boundary in a system's frequency response at which energy flowing through the sys...
Digital biquad filter
In signal processing, a digital biquad filter is a second-order recursive linear filter, containing two poles and two zeros.
In signal processing, a digital biquad filter is a second-order recursive linear filter, containing two poles and two zeros.
Electrical resonance
Electrical resonance occurs in an electric circuit at a particular resonance frequency where the imaginary parts of circuit element impedances or admittances cancel each other.
Electrical resonance occurs in an electric circuit at a particular resonance frequency where the imaginary parts of circuit element impedances or admittances cancel each other.
Equivalent impedance transforms
An equivalent impedance is an equivalent circuit of an electrical network of impedance elements which presents the same impedance between all pairs of terminals as did the given network.
An equivalent impedance is an equivalent circuit of an electrical network of impedance elements which presents the same impedance between all pairs of terminals as did the given network.
Filter (signal processing)
In signal processing, a filter is a device or process that removes from a signal some unwanted component or feature.
In signal processing, a filter is a device or process that removes from a signal some unwanted component or feature.
Filter design
Filter design is the process of designing a filter (in the sense in which the term is used in signal processing, statistics, and applied mathematics), often a linear shift-invariant filter, that...
Filter design is the process of designing a filter (in the sense in which the term is used in signal processing, statistics, and applied mathematics), often a linear shift-invariant filter, that...
Finite impulse response
In signal processing, a finite impulse response filter is a filter whose impulse response is of finite duration, because it settles to zero in finite time.
In signal processing, a finite impulse response filter is a filter whose impulse response is of finite duration, because it settles to zero in finite time.
Image filter end terminations
This article explains how the effects of image filter end terminations can be taken into account.
This article explains how the effects of image filter end terminations can be taken into account.
Image impedance
Image impedance is a concept used in electronic network design and analysis and most especially in filter design.
Image impedance is a concept used in electronic network design and analysis and most especially in filter design.
Impedance matching
In electronics, impedance matching is the practice of designing the input impedance of an electrical load to maximize the power transfer or minimize reflections from the load.
In electronics, impedance matching is the practice of designing the input impedance of an electrical load to maximize the power transfer or minimize reflections from the load.
Impulse invariance
Impulse invariance is a technique for designing discrete-time infinite-impulse-response (IIR) filters from continuous-time filters in which the impulse response of the continuous-time system is ...
Impulse invariance is a technique for designing discrete-time infinite-impulse-response (IIR) filters from continuous-time filters in which the impulse response of the continuous-time system is ...
Infinite impulse response
Infinite impulse response (IIR) is a property of signal processing systems.
Infinite impulse response (IIR) is a property of signal processing systems.
Kolmogorov-Zurbenko filter
Kolmogorov–Zurbenko (KZ) Filter was first proposed by Kolmogorov and formally defined by Zurbenko.
Kolmogorov–Zurbenko (KZ) Filter was first proposed by Kolmogorov and formally defined by Zurbenko.
Least mean squares filter
Least mean squares (LMS) algorithms are a class of adaptive filter used to mimic a desired filter by finding the filter coefficients that relate to producing the least mean squares of the error ...
Least mean squares (LMS) algorithms are a class of adaptive filter used to mimic a desired filter by finding the filter coefficients that relate to producing the least mean squares of the error ...
Linear filter
Linear filters in the time domain process time-varying input signals to produce output signals, subject to the constraint of linearity.
Linear filters in the time domain process time-varying input signals to produce output signals, subject to the constraint of linearity.
Linkwitz-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 de...
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 de...
Linkwitz–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 de...
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 de...
Matched Z-transform method
The matched Z-transform method, also called the pole–zero mapping or pole–zero matching method, is a technique for converting a continuous-time filter design to a discrete-time filte...
The matched Z-transform method, also called the pole–zero mapping or pole–zero matching method, is a technique for converting a continuous-time filter design to a discrete-time filte...
Multidelay block frequency domain adaptive filter
The Multidelay block frequency domain adaptive filter (MDF) algorithm is a block-based frequency domain implementation of the (normalised) Least mean squares filter (LMS) algorithm.
The Multidelay block frequency domain adaptive filter (MDF) algorithm is a block-based frequency domain implementation of the (normalised) Least mean squares filter (LMS) algorithm.
Nonlinear filter
A nonlinear filter is a signal-processing device whose output is not a linear function of its input.
A nonlinear filter is a signal-processing device whose output is not a linear function of its input.
Parks-McClellan filter design algorithm
The Parks-McClellan algorithm, published by James McClellan and Thomas Parks in 1972, is an iterative algorithm for finding the optimal Chebyshev finite impulse response (FIR) filter.
The Parks-McClellan algorithm, published by James McClellan and Thomas Parks in 1972, is an iterative algorithm for finding the optimal Chebyshev finite impulse response (FIR) filter.
Passband
A passband is the range of frequencies or wavelengths that can pass through a filter without being attenuated.
A passband is the range of frequencies or wavelengths that can pass through a filter without being attenuated.
Passive analogue filter development
Analogue filters are a basic building block of signal processing much used in electronics.
Analogue filters are a basic building block of signal processing much used in electronics.
Propagation constant
The propagation constant of an electromagnetic wave is a measure of the change undergone by the amplitude of the wave as it propagates in a given direction.
The propagation constant of an electromagnetic wave is a measure of the change undergone by the amplitude of the wave as it propagates in a given direction.
Prototype filter
Prototype filters are electronic filter designs that are used as a template to produce a modified filter design for a particular application.
Prototype filters are electronic filter designs that are used as a template to produce a modified filter design for a particular application.
Quadrature mirror filter
In digital signal processing, a quadrature mirror filter is a filter most commonly used to implement a filter bank that splits an input signal into two bands.
In digital signal processing, a quadrature mirror filter is a filter most commonly used to implement a filter bank that splits an input signal into two bands.
Quarter wave impedance transformer
A quarter wave impedance transformer, often written as λ/4 impedance transformer, is a component used in electrical engineering consisting of a length of transmission line or waveguide exa...
A quarter wave impedance transformer, often written as λ/4 impedance transformer, is a component used in electrical engineering consisting of a length of transmission line or waveguide exa...
Quarter-wave impedance transformer
A quarter-wave impedance transformer, often written as λ/4 impedance transformer, is a component used in electrical engineering consisting of a length of transmission line or waveguide exa...
A quarter-wave impedance transformer, often written as λ/4 impedance transformer, is a component used in electrical engineering consisting of a length of transmission line or waveguide exa...
Recursive least squares filter
The Recursive least squares (RLS) adaptive filter is an algorithm which recursively finds the filter coefficients that minimize a weighted linear least squares cost function relating to the inp...
The Recursive least squares (RLS) adaptive filter is an algorithm which recursively finds the filter coefficients that minimize a weighted linear least squares cost function relating to the inp...
Ringing (signal)
In electronics, signal processing, and video, ringing is unwanted oscillation of a signal, particularly in the step response.
In electronics, signal processing, and video, ringing is unwanted oscillation of a signal, particularly in the step response.
Ripple (electrical)
The most common meaning of ripple in electrical science, is the small unwanted residual periodic variation of the direct current output of a power supply which has been derived from an alternati...
The most common meaning of ripple in electrical science, is the small unwanted residual periodic variation of the direct current output of a power supply which has been derived from an alternati...
Sample matrix inversion
Sample matrix inversion (or direct matrix inversion) is an algorithm that estimates weights of an array (adaptive filter) by replacing the correlation matrix Ru with its estimate.
Sample matrix inversion (or direct matrix inversion) is an algorithm that estimates weights of an array (adaptive filter) by replacing the correlation matrix Ru with its estimate.
Savitzky-Golay smoothing filter
The Savitzky–Golay smoothing filter is a type of filter first described in 1964 by Abraham Savitzky and Marcel J. E. Golay.
The Savitzky–Golay smoothing filter is a type of filter first described in 1964 by Abraham Savitzky and Marcel J. E. Golay.
Savitzky–Golay smoothing filter
The Savitzky–Golay smoothing filter is a type of filter first described in 1964 by Abraham Savitzky and Marcel J. E. Golay.
The Savitzky–Golay smoothing filter is a type of filter first described in 1964 by Abraham Savitzky and Marcel J. E. Golay.
Sinc filter
In signal processing, a sinc filter is an idealized filter that removes all frequency components above a given bandwidth, leaves the low frequencies alone, and has linear phase.
In signal processing, a sinc filter is an idealized filter that removes all frequency components above a given bandwidth, leaves the low frequencies alone, and has linear phase.
Stopband
A stopband is a band of frequencies, between specified limits, through which a circuit, such as a filter or telephone circuit, does not allow signals to pass, or the attenuation is above the req...
A stopband is a band of frequencies, between specified limits, through which a circuit, such as a filter or telephone circuit, does not allow signals to pass, or the attenuation is above the req...
Washout filter
The washout filter H places a zero at the origin, which constrains the spiral mode pole to remain near the origin.
The washout filter H places a zero at the origin, which constrains the spiral mode pole to remain near the origin.
YIG sphere
Yttrium iron garnet spheres (YIG spheres) serve as magnetically tunable filters and resonators for microwave frequencies.
Yttrium iron garnet spheres (YIG spheres) serve as magnetically tunable filters and resonators for microwave frequencies.
Zero Forcing Equalizer
Zero Forcing Equalizer refers to a form of linear equalization algorithm used in communication systems which inverts the frequency response of the channel.
Zero Forcing Equalizer refers to a form of linear equalization algorithm used in communication systems which inverts the frequency response of the channel.