notch filter


Also found in: Acronyms.

notch filter

[′näch ‚fil·tər]
(electronics)
A band-rejection filter that produces a sharp notch in the frequency response curve of a system; used in television transmitters to provide attenuation at the low-frequency end of the channel, to prevent possible interference with the sound carrier of the next lower channel.

Filter, Notch

 

a type of rejection filter. A notch filter is a two-terminal network, usually a parallel resonant circuit, that is inserted into an electric circuit. The impedance of the network increases sharply in a certain relatively narrow frequency band. A notch filter attenuates alternating currents in the particular frequency band and transmits currents at frequencies outside the band.

notch filter

A type of bandstop filter that reduces a narrow range of frequencies. For example, a notch filter in a musical instrument amplifier may reduce frequencies in the range of 59 to 61 Hz, which is sufficient to eliminate any hum coming from the 60 Hz power line. See bandstop filter.
References in periodicals archive ?
For "Book Page 2", Triangle, Hermite, Quadratic, Cubic B-Spline, Gaussian and Notch filters were constantly the best.
Instead, it is implemented, together an adaptive notch filter, namely ANF-FXLMS algorithm.
As part of a calibration sequence, a notch filter measures the harmonics.
There is also a wide range of filters that you can apply, including ban pass filter, high pass filter, high shelf filter, low pass filter, low shelf filter, and notch filter.
85-inch twist and flat cable places devices at quarter wavelength spacing, which creates a periodic structure that has the effect of a notch filter at the key frequency of 160MHz.
Other features include PID control with velocity and acceleration feed-forward and notch filter parameters, nonvolatile memory for storing multiple programs, and multitasking for concurrent execution of eight programs.
The spectrum notch filter on the CCD allows for high performance with no moving parts.
The test set at the remote end filters out the power of the 1004 Hz tone with a 1004 Hz notch filter in the receiver, so that only the noise is measured.
It was (literally) a black box that included a notch filter to help deal with the "room boom" caused by floor-to-ceiling reflections and a high-pass filter that made the system into a 6th-order system on the bottom end, increasing low-bass response down to the high teens and imposing a sharp cut-off below.
58 notch filter reduces dot crawl, and Video Noise Reduction helps smooth the picture.
Results show that increase of notch filter depth can cause two pulses generation at the edges of input NRZ pulses and lead to recovered clock signal degradations.
Type I is the conventional CLL structure to be used as the notch filter for UWB antenna.