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 ?
A notch filter centered at 825 Hz is used instead of 1020 Hz.
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.
Devices Combine Low Noise, Integrated Class-D Audio Power Amplifier, and Programmable Notch Filters to Increase Performance and Maximize Battery Life
Its unique product portfolio includes its adaptive notch filter (ANF(TM)), the new RF(2) solution, and a number of other products and services.
Our product portfolio includes our unique and proprietary adaptive notch filter (ANF(TM)), our new RF2 solution, and our proprietary HTS tower top and base station units.
ISO's product portfolio includes a family of products based upon its Adaptive Notch Filter (ANF) and Radio Link Radio Frequency Fidelity platform (RF2) platforms.
In addition to serving on the program committee for CARTS USA 2006, Stevenson presented a conference paper titled "MLCC Notch Filter for Pacemaker Distance Telemetry Antenna.
We are very excited about the future of this product, especially in conjunction with our Adaptive Notch Filter (ANF(TM)) solutions.
WiSpry's first product, a varicap duplexer, scheduled for production release in Q1 2006, is a two-state, tunable notch filter suitable for CDMA and W-CDMA handsets.
The high-performance CODEC is based on Wolfson's proven 897X platform and includes a built-in audio-enhancement DSP for wind noise filter, notch filter, 5 Band EQ, 3D audio.
a leading global supplier of interference-control solutions for the wireless telecommunications industry, announces the arrival of its next generation Adaptive Notch Filter (ANF(TM)) Flex product.