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 | | Filters, Band Elimination & Notch |
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In signal processing, a band-stop filter or band-rejection filter is a filter that passes most frequencies unaltered, but attenuates those in a range to very low levels. It is the opposite of a band-pass filter. A notch filter is a band-stop filter with a narrow stopband (high Q factor).
Other names include 'band limit filter', 'T-notch filter', 'band-elimination filter', and 'band-rejection filter'.
Typically, the width of the stopband is less than 1 to 2 decades (that is, the highest frequency attenuated is less than 10 to 100 times the lowest frequency attenuated). In the audio band, a notch filter uses high and low frequencies that may be only semitones apart.
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| Platinum Partners |
| Bronze Partners |
| Aeroflex Laboratories Inc |
| Allen Avionics, Inc. |
| Alpha Components |
| Amecon, Inc. |
| American Trans-Coil Corp. |
| Analogic DCP |
| Anatech Electronics, Inc. |
| Auxora Inc |
| Avens Signal Equipment Corp. |
| AXTAL GmbH & Co. KG |
| Ballantine Laboratories |
| Barr Associates Inc. |
| Betatronics, Inc. |
| BH Electronics, Inc. |
| Blonder Tongue Labs Inc |
| Central Technologies |
| Chesterfield Products, Inc. |
| Coast Magnetics |
| Coilcraft |
| Communication Coil Inc. |
| Communications & Energy Corp. |
| ComNav Engineering, Inc. |
| Conductus, Inc. |
| Corning Frequency Control |
| Dontech, Inc. |
| Electro-Metrics |
| Electrocom Industries |
| Electrocube, Inc. |
| Elpac Power Systems |
| Faraday Technology |
| Filtronetics, Inc. |
| Freed Transformer Company, Inc. |
| Hisonic, Inc. |
| Inductive Technologies |
| Integrated Microwave Corporation |
| Integration Assocs. Inc. |
| K & L Microwave, Inc. |
| Kappa Technologies, Inc. |
| KOA Speer Electronics, Inc. |
| KR Electronics, Inc. |
| Krohn-Hite Corp. |
| KW Microwave Corporation |
| L-3 Communications |
| Lark Engineering Company |
| LCR Electronics, Inc. |
| Linear Technology Corp. |
| Magnetico, Inc. |
| Metuchen Capacitors, Inc. |
| Microphase Corporation |
| Microwave Circuits, Inc. |
| Microwave Filter Co., Inc. |
| Mini-Circuits |
| Mitec Telecom Inc. |
| MMD Components/Monitor QuartztekProducts |
| MTK Electronics, Inc. |
| Netcom Inc. |
| Networks International Corp. |
| North Hills Signal Processing |
| PCA Electronics Inc. |
| Polara Engineering Inc. |
| Pole/Zero Corp. |
| Precision Filters, Inc. |
| Reactel, Inc. |
| RFI Corp. |
| RLC Electronics, Inc. |
| Rsm Sensitron Semiconductor |
| Salisbury Engineering, Inc. |
| Signal Technology Corporation |
| Sinclair Technologies Inc. |
| Solar Electronics Company |
| TDK Corporation of America |
| Teledyne Instrument/Analycical |
| Television Equipment Associates |
| Thordarson Inc. |
| Thordarson Meissner Incorporated |
| Toko America, Inc. |
| Toyocom USA Inc. |
| Trilithic, Inc. |
| TTE, Incorporated |
| Ultra-Crea Oy |
| Unadilla Antenna Manufacturing Company |
| Vertex RSI-Torrance |
| Wilco Corporation |
| Books |
Analog Filter Design (The Oxford Series in Electrical and Computer Engineering)
M. E. Van Valkenburg
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| Excerpt - page 138: "... Because of the particular shape of this magnitude response, the filter giving this response is known as a notch filter and also as a band-elimination or a bandstop filter. This kind of filter is useful ..." | | See more references to Filters, Band Elimination & Notch in this book. |
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Electronics and Communications for Scientists and Engineers
Martin Plonus
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| Excerpt - page 64: "... Chapter 2 AC Circuits a b FIGURE 2.11 (a) A band-elimination or notch filter. (b) The voltage gain response as a function of frequency. ..." | | See more references to Filters, Band Elimination & Notch in this book. |
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Genetic Programming III: Darwinian Invention and Problem Solving
John R. Koza, Forrest H. Bennett III, David Andre, and Martin A. Keane
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| Excerpt - page 441: "... KHz and 2 KHz is the transition region for the filter. The voltage drops off from ... bandstop filter (also called a band-reject, band-elimination, or notch filter) stops all frequencies in a specified range while passing ..." | | See more references to Filters, Band Elimination & Notch in this book. |
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Advanced Instrumentation and Computer I/O Design: Real-Time Computer Interactive Engineering
Patrick H. Garrett
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| Excerpt - page 85: "... fo, respectively; total phase shift is a function of the filter order n - 90( ... bandreject filter, also called a band-elimination or notch filter, passes all frequencies except those centered about f.. Its ..." | | See more references to Filters, Band Elimination & Notch in this book. |
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Multisensor Instrumentation 6 Design: Defined Accuracy Computer Integrated Measurement Systems
Patrick H. Garrett
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| Excerpt - page 66: "... fo, respectively; total phase shift is a function of the filter order n he band-reject filter, also called a band-elimination or notch filter, passes all frequencies except those centered about fc. Its ..." | | See more references to Filters, Band Elimination & Notch in this book. |
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