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Frequency Devices
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Electronic Filters, Amplifiers & Oscillators - Frequency Devices
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Analog & DSP, FIR Electronic Filters - Frequency Devices

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   Filters, Equalizer

Electronic filters are electronic circuits which perform signal processing functions, specifically intended to remove unwanted signal components and/or enhance wanted ones. Electronic filters or audio filters can be:

  • passive or active
  • analog or digital
  • discrete-time (sampled) or continuous-time
  • linear or non-linear
  • infinite impulse response (IIR type) or finite impulse response (FIR type)

The most common types of electronic filters are linear filters, regardless of other aspects of their design. See the article on linear filters for details on their design and analysis.



Bronze Partners
Aeroflex Laboratories Inc
Allen Avionics, Inc.
Alpha Components
Anatech Electronics, Inc.
Auxora Inc
Chesterfield Products, Inc.
CiDRA Corp
Communication Coil Inc.
Communications & Energy Corp.
Corning Frequency Control
DiCon Fiberoptics, Inc.
Electrocube, Inc.
Filtronetics, Inc.
Hisonic, Inc.
Inductive Technologies
Integrated Microwave Corporation
Integration Assocs. Inc.
Kappa Technologies, Inc.
KR Electronics, Inc.
LCR Electronics, Inc.
Linear Technology Corp.
Magnetico, Inc.
Microphase Corporation
Mini-Circuits
Networks International Corp.
Precision Filters, Inc.
Proxim Wireless Networks
Reactel, Inc.
RFI Corp.
RLC Electronics, Inc.
Rockwell Collins Filter Products
SBG Labs.
Signal Processing Solutions
Signal Technology Corp.
Steward
Television Equipment Associates
Trilithic, Inc.
TTE, Incorporated
Viewsonics
Analog & DSP, FIR Electronic Filters - Frequency Devices

 

Books
Attenuators, equalizers, and filters, (A Howard W. Sams photofact publication)
Howard M Tremaine

Design of Analog Filters
Rolf Schaumann and Mac E. Van Valkenburg

Excerpt - page 110: "... The asymptotic Bode plot of Fig. 3.47a describes a band-enhancement filter or gain equalizer. We wish to obtain additional gain over a narrow band ..."
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Adaptive Filters Theory and Applications
B. Farhang-Boroujeny

Excerpt - page 12: "... deteriorates the performance of data receivers. The role of the equalizer, as a filter, is to resolve the distortion introduced by the channel (i.e. ..."
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Analog Filter Design (The Oxford Series in Electrical and Computer Engineering)
M. E. Van Valkenburg

Excerpt - page 151: "... use it to study the lowpass notch and highpass notch filters illustrated by Fig. 12.39, and also the gain-equalizer filter illustrated by Fig. 5.32. Let R2 = R, = ..."
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Active Filter Cookbook, Second Edition
DON LANCASTER

Excerpt - page 16: "... a wide range. Finally, the three outputs of the state-variable filter can be summed up to get all-pass, equalizer, bandstop, and other filter responses. Fig. 1-6 shows two state-variable ..."
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Continuous-Time Active Filter Design
T. Deliyannis, Yichuang Sun, and J.K. Fidler

Excerpt - page 4: "... its initial form. This can be achieved by means of filters and equalizers. ..."
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Optical Filter Design and Analysis: A Signal Processing Approach (Wiley Series in Microwave and Optical Engineering)
Christi K. Madsen and Jian H. Zhao

Excerpt - page 15: "... optical analog in later chapters. Chapters 4-6 focus on multi-stage filter architectures. Filter design examples are given for bandpass filters, gain equalizers, and dispersion compensators. While perfect filters can be designed on ..."
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Analog Signal Processing with Laplace Transforms and Active Filter Design
Don Meador

Excerpt - page 302: "... fl, and fl, There are many applications possible for each filter type. We can also combine the filters. An application for combining the filters is an equalizer for music, as shown in Fig. 6-8. The music is ..."
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Magnitude and Delay Approximation of 1-D and 2-D Digital Filters (Digital Signal Processing)
Belle A. Shenoi

Excerpt - page 4: "... F--Stopband s, r-------~--- Q), CU, (0 Fig. 1.2. Ideal Lowpass filter with tolerance specifications and delay equalizers are not well-developed. But for this purpose, efficient numerical methods ..."
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CRC Handbook of Electrical Filters
John Taylor and Qiuting Huang

Excerpt - page 24: "... can be observed, interrupted, and restarted at will. 4. Delay equalizer design - To equalize a given filter delay, we need still another optimization procedure. This one adds ..."
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Analog Filters
Kendall L. Su, K. L. Su, and Su

Excerpt - page 4: "... is not satisfactory, we introduce additional networks, known as delay equalizers or phase linearizers, to improve the delay function. 1.3 Ideal and Approximate Filter Characteristics In Fig. 1.2, five ideal filter magnitude characteristics are ..."
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Active Filters for Intergrated-Circuit Applications (Artech House Microwave Library)
Fred Irons

Excerpt - page 10: "... response as shown in Figure 1.9. The combination of passive filter plus amplifier could be called ... and to provide isolation. Telephone repeater-equalizer networks have incorporated such designs in the past. Modern filters ..."
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High Frequency Continuous Time Filters in Digital CMOS
Shanthi Pavan and Yannis Tsividis

Excerpt - page 2: "... function is two fold. First, it acts as an anti-aliasing filter, to prepare for signal digitization downstream. It also serves as a first pass equalizer for the channel. The signal is sampled and quantized in ..."
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Filter Design with Time Domain Mask Constraints: Theory and Applications (Applied Optimization)
Ba-Ngu Vo, Antonio Cantoni, and Kok Lay Teo

Excerpt - page 5: "... the K-criteria, then it is necessary to insert an equalizing filter. The function of this equalizing ... in the design of the equalizer, only the distorted pulse is required. Since any broadband white ..."
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Electric filters;: A simplified treatment of the four-terminal networks commonly used in telephone work, covering filters, attenuators, phase shifting networks, and attenuation equalizers,
Thomas Henry Turney

Microstrip Filters for RF/Microwave Applications
Jia-Shen G. Hong and M. J. Lancaster

Fundamentals of Adaptive Filtering
Ali H. Sayed

Excerpt - page 139: "... the discussion of Sec. 2.7.3 to the design of fractionally-spaced equalizers. The main distinction between a ... received data, i.e., the equalizer filters the received data at a higher rate than the symbol ..."
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Least-Mean-Square Adaptive Filters (Adaptive and Learning Systems for Signal Processing, Communications and Control Series)
Simon Haykin and B. Widrow

Sound Reinforcement Handbook
Gary D. Davis and Ralph Jones

Excerpt - page 65: "... FULLY PARAMETRIC EQ Figure 7-7. Block Diagram Symbols: Filters and Equalizers YAMAHA SOUNd REINIORCEMENT HANdbook PAre 65 (FUNCTION) D (FUNCTION) (See ..."
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Statistical and Adaptive Signal Processing: Spectral Estimation, Signal Modeling, Adaptive Filtering and Array Processing (Artech House Signal Processing Library)
Dimitris G. Manolakis, Dimitris Manolakis, Vinay K. Ingle, and Stephen M. Kogon

Excerpt - page 21: "... can compensate for the ISI distortion by using a linear filter called an equalizer. The goal of the equalizer is to restore the received ..."
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Master Handbook of Acoustics
F. Alton Everest

Excerpt - page 128: "... should bring major advances in this field. Endnote 'Burkhard, Mahlon, Filters and Equalizers, Chapter 20, Handbook For Sound Engineers, Glen Ballou, Ed., Carmel, ..."
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Producing Great Sound for Digital Video
Jay Rose

Excerpt - page 46: "... book's CD. The only solution is to use an aliasing filter: an equalizer that absolutely blocks any frequency higher than half the sample ..."
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Mastering Audio: The Art and the Science
Bob Katz

Excerpt - page 203: "... loosen the bass, which can sometimes be desirable; the digital equalizer retains the tightness of the ... or some other tool. analog filters. Equalizer curve shape and phase shift probably make up other ..."
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Building Systems for Interior Designers
Corky Binggeli

Excerpt - page 427: "... masking system consists of a signal (noise) generator , an equalizer for shaping the signal, an ... to the user's preference with filters in the equalizer . The sound is usually tuned to ..."
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The Recording Engineer's Handbook
Bobby Owsinski

Excerpt - Back Matter: "... of the attack and release times on a compressor. Pultec-An equalizer sold during the 50s and ... Chapter 1). Q-Bandwidth of a filter or equalizer. Ratio-A parameter control on a compressor/limiter that deter- ..."
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Unsupervised Adaptive Filtering, Volume 1: Blind Source Separation
Simon Haykin

Excerpt - page 53: "... figure, it is seen that these algorithms effectively use the equalizer as a prewhitening filter within the coefficient updates. A discussion of the relationships of ..."
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Modern Recording Techniques
David Miles Huber and Robert E. Runstein

Excerpt - Index: "... 286 nonlinear devices, 49 normalization (digital recordings), 236, 476 notch filter equalizers, 355 Note Off messages (MIDI devices), 257 Note On messages ..."
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Adaptive Wireless Transceivers: Turbo-Coded, Turbo-Equalized and Space-Time Coded TDMA, CDMA, and OFDM Systems
Lajos Hanzo, C. H. Wong, and M. S. Yee

Excerpt - page 38: "... 38 CHAPTER 2. INTRODUCTION TO EQUALIZERS Fwd Filter CM Detector Bwd Filter B(f) Figure 2.8: Schematic of the ..."
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Femme Digitale: Perfecting the Female Form on Your Computer
Michael Burns

Excerpt - page 121: "... created the rays of light with the KPT filter Frax Flame in Photoshop GM ... I used the KPT filter Equalizer to mix the colors in a surrealistic way, add a ..."
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Audio Postproduction for Digital Video
Jay Rose

Excerpt - page 252: "... give you a choice of equalizer types: cutoff filter, shelving equalizer, peaking equalizer, parametric , or ... characteristics beyond frequency. Slope and filters A filter is an equalizer that passes part of the ..."
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Power Tools for Reason 3.0: Master the World's Most Popular Virtual Studio Software (Power Tools Series)
Kurt Kurasaki and Alex Swift

Excerpt - page 93: "... unapter Filter and Effects Equalizer filters and equalizers are devices that alter the frequency content of ..."
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Power Tools for Synthesizer Programming: The Ultimate Reference for Sound Design (Power Tools Series)
Jim Aikin

Excerpt - page 29: "... relatively simple and dull? After recording the sound, use the filter or equalizer features of your sampler to emphasize or remove certain frequency ..."
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Analog Circuit Design: Structured Mixed-Mode Design, Multi-Bit Sigma-Delta Converters, Short Range RF Circuits
Michiel Steyaert, Arthur H.M. van Roermund, and Johan H. Huijsing

Excerpt - page 107: "... We used a later version of ANACONDA [4] on the equalizer filter (EQF) subsystem at the front-end of the analog signal path. ..."
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Sound Check: The Basics of Sound and Sound Systems
Tony Moscal

Excerpt - Back Matter: "... by increasing or decreasing frequency ranges through tone controls , filters, or equalizers. EXCURSION The extent or measure of a loudspeaker's cone movement. ..."
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Guide to Sound Systems for Worship
Jon F. Eiche

Excerpt - page 38: "... CHAPTER 4 HIGH PASS FILTER I- HIGH FREQUENCY SHELVING EO ... Block diagram symbols: filters and equalizers. (FUNCTION) n (FUNCTION) THE YAMAHA GUIDE TO SOUND SYSTEMS FOR ..."
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Modern Digital and Analog Communication Systems (The Oxford Series in Electrical and Computer Engineering)
B. P. Lathi

Excerpt - page 148: "... signal in Fig. 3.35a is passed through the tapped delay equalizer shown in Fig. P3.6-2. Hint: From Eq. (3.63a), it is clear that the equalizer filter transfer function should be Heq (w) = I /(1 +a ..."
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