Filter theory

type of filter in signal processing

adjusting input/output impedances of an electrical circuit for some purpose

frequency response boundary

occurs in an electric circuit at a particular resonant frequency when the imaginary parts of impedances or admittances of circuit elements cancel each other

property of many linear time-invariant (LTI) systems

signal processing device or process that removes unwanted components or features from a signal, or enhances wanted ones, or both

signal processing filter

residual periodic variation of the DC voltage within a power supply which has been derived from an alternating current source

filter having a linear response

complex measure of the attenuation (real part) and phase angle (imaginary part) along the path travelled by a plane wave

adaptive filter algorithm for digital signal processing

idealized filter that removes all signal frequency components above a given frequency

filter used in signal processing on continuous-time signals

unwanted oscillation of a signal

electrical component

algorithm to smoothen data points

electrical circuits that are the dual of each other

Magnetic device

algorithm

thumb|upright=1.75|Frequency response of an example bandpass filter. The frequencies between a stopband and a passband define the transition band.

Filter whose output is not a linear function of its input

digital signal filter

equivalent circuit for impedance networks

electronic filter designs that are used as a template to produce a modified filter design for a particular application

Type of electronic filter used in audio

electronic filter