notch filter

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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 ?
Customers can also select the optical filters like IR-pass filters, IR band-pass filters, NIR notch filters etc.
Customers can also choose the optical filters such as IR-pass filters, IR band-pass filters, NIR notch filters etc.
Notch filters, on the other hand, have the advantage of suppressing only the tremor frequency and reducing distortion of intentional signals [21].
On the output there are harmonics which are reduced with notch filters.
Devices Combine Low Noise, Integrated Class-D Audio Power Amplifier, and Programmable Notch Filters to Increase Performance and Maximize Battery Life
Scattering can be eliminated by using two holographic notch filters in the apparatus (Fig.
Kaiser Optical Systems offers a wide range of products and perhaps is best known for their holographic notch filters, which it OEMs to all leading Raman vendors.
When a C-message and notch filters are both used, the measurement is referred to as a "C-notched noise" measurement.
The CT-35G30, CT-35G20 and console CT-35S61 all have PanaBlack tubes and the Easicon menu system, along with both comb and notch filters.
Additionally, the repeatability of RF parameters also makes Accu-P([R]) capacitors particularly suitable for use as stand-alone notch filters.
Optical and cable infrastructure including dual and quad channel limiting and linear drivers and TIAs for next generation 100, 200 and 400 Gb/s optical systems; GaN and Gs MMICs for CATV; and temperature-compensated notch filters enabling the coexistence of Wi-Fi and LTE.