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.

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A notch filter centered at 825 Hz is used instead of 1020 Hz.

Testing the POTS portion of ADSL

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.

Myriad Panasonic products to debut

Devices Combine Low Noise, Integrated Class-D Audio Power Amplifier, and Programmable Notch Filters to Increase Performance and Maximize Battery Life

TI Delivers Low-Power Stereo Audio Codecs with 7-mW Playback for Portable Consumer Applications

Its unique product portfolio includes its adaptive notch filter (ANF(TM)), the new RF(2) solution, and a number of other products and services.

Webcast Alert: ISCO International, Inc. Announces 2003 Investor Call Webcast

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.

Webcast Alert: ISCO International, Inc. Announces Third Quarter Investor Call Webcast

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.

Standard & Poor's Initiates Factual Stock Report Coverage on ISCO International, Inc

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.

Robert Stevenson of Greatbatch Technologies receives Dr. Felix Zandman Award at CARTS USA 2006 conference

We are very excited about the future of this product, especially in conjunction with our Adaptive Notch Filter (ANF(TM)) solutions.

ISCO International Announces Launch of RF(2) Product Line

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.

STRATEGY ANALYTICS: RF MEMS for Cellphones Near Readiness; MEMS Varicaps Could Alleviate RF Bottlenecks in W-EDGE 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.

Wolfson Offers Class A/B-to-D Switchable CODEC

The notch filter creates a window in the video signal at approximately 4.

Fairchild Semiconductor Introduces the Industry's Most Highly Integrated Standard Definition, Precision Video Filter/Driver for Set-Top Boxes and Personal Video Recorders; FMS6406 Integrates a Sound Notch and Eliminates Dozens of Discrete Devices

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.