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   Filters, Digital

In electronics, a digital filter is any electronic filter that works by performing digital mathematical operations on an intermediate form of a signal. This is in contrast to older analog filters which work entirely in the analog realm and must rely on physical networks of electronic components (such as resistors, capacitors, transistors, etc.) to achieve the desired filtering effect.

Digital filters can achieve virtually any filtering effect that can be expressed as a mathematical function or algorithm. The two primary limitations of digital filters are their speed (the filter can't operate any faster than the computer at the heart of the filter), and their cost. However as the cost of integrated circuits has continued to drop over time, digital filters have become increasingly commonplace and are now an essential element of many everyday objects such as radios, cellphones, and stereo receivers.



Platinum Partners
Frequency Devices, Inc.
Bronze Partners
Arco Electronics
Ballantine Laboratories
CiDRA Corp
Corning Frequency Control
Electrocube, Inc.
Engineered Components Company
ETS-Lindgren
Integration Assocs. Inc.
JMK, Inc.
K & L Microwave, Inc.
L-3 Communications Telemetry-East
LCR Electronics, Inc.
Logic Devices Inc.
Murata Electronics North America, Inc.
National Instruments
NPC America
Precision Filters, Inc.
R. C. Electronics Inc.
RCD Components, Inc.
RFI Corp.
ROHM Electronics USA, LLC
Signal Processing Solutions
Spectrum Signal Processing
Steward
Synetcom Digital Inc.
Television Equipment Associates
Analog & DSP, FIR Electronic Filters - Frequency Devices

 

Books
Introduction to Digital Signal Processing and Filter Design
B. A. Shenoi

Excerpt - page 23: "... the coefficients, we can change the transfer function of the filter, while chang- ing the sample ... in ana- log filters. The digital filters are easily programmed to do time-shared filtering under time- ..."
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Digital Filters
Richard W. Hamming

Digital Signal Processing: A Practical Guide for Engineers and Scientists
Steven Smith

Excerpt - page 6: "... the teeth and lips. Vocal tract simulators operate by generating digital signals that resemble these two ... excitation signal through a digital filter with similar resonances. This approach was used in one of ..."
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Complete Guide to Filters for Digital Photography (A Lark Photography Book)
Joseph R. Meehan

Practical Analog And Digital Filter Design (Artech House Microwave Library)
Les Thede

Excerpt - page 2: "... first four chapters concentrate on filter approximation theory and analog filter implementation. In the final section of this chapter we discuss WFilter, an analog and digital filter design package for Windowshich is included on the ..."
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Digital Filter Design Solutions (Artech House Microwave Library)
Jolyon M. De Freitas and Jolyon M. De Freitas

Excerpt - page 1: "... 1 Introduction 1.1 BACKGROUND This collection of predesigned linear phase digital filters has been prepared to serve the category of users whose ..."
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Digital Filters: Basics and Design
Dietrich Schlichtharle

Excerpt - page 10: "... by the poles of the system. For the design of digital filters which are intended to reproduce the properties of analog filters ..."
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Analog and Digital Filter Design, Second Edition (EDN Series for Design Engineers)
Steve Winder

Excerpt - page 41: "... values are given in this chapter for analog passive lowpass filters. Formulae used to derive many ... of analog active filters and digital IIR filters will be given in Chapter 3. Filter Requirements ..."
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Multirate Digital Signal Processing: Multirate Systems - Filter Banks - Wavelets
N. J. Fliege

Excerpt - page 37: "... derived, as tools for further work. The design of FIR filters is then discussed in the next chapter. 2.1 Introduction The transfer properties of a digital filter in the time domain are given by the convolution ..."
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Digital Filter Design (Topics in Digital Signal Processing)
T. W. Parks and C. S. Burrus

Excerpt - page 3: "... Introduction to Digital Filters Digital filters, at first, were simulations of analog filters on ..."
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Digital Signal Processing with Field Programmable Gate Arrays (Signals and Communication Technology)
Uwe Meyer-Baese

Excerpt - page 109: "... 3. Finite Impulse Response (FIR) Digital Filters 3.1 Digital Filters Digital filters are typically used to modify or alter the attributes ..."
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Magnitude and Delay Approximation of 1-D and 2-D Digital Filters (Digital Signal Processing)
Belle A. Shenoi

Excerpt - page 2: "... domain. We will also call the continuous-time circuits as analog filters. Similar meaning will be conveyed when we treat the design of 1-D, and 2-D discrete-time filters also called as 1-D and 2-D digital filters. The theory of approximating the frequency response specifications of ..."
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Adaptive Digital Filters, Second Edition, (Signal Processing and Communications)
Bellanger

Excerpt - page 99: "... K. Breakall, and G. K. Karawas, "The Discrete Prolate Spheroidal Filter as a Digital Signal Processing Tool," IEEE Trans. ASSP-33, 1471 1478 (December 1985). ..."
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Advanced Digital Signal Processing and Noise Reduction
Saeed V. Vaseghi

Excerpt - page 6: "... noise from the second microphone is processed by an adaptive digital filter to make it equal to the noise contaminating the speech ..."
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The Digital Signal Processing Handbook
Vijay K. Madisetti and Douglas Williams

Excerpt - page 5: "... Fast Fourier Transform in Spectral Analysis nite Impulse Response Digital Filter Design urier Analysis of Ideal and W. Kenneth Jenkins ..."
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Digital Signal Processing with Examples in MATLAB
Samuel D. Stearns

Excerpt - page 1: "... now many special topics within DSP, such as image processing, digital communications, signal coding and compression, ... or wavelet transforms or digital filters, for example. The second choice is to provide a connected ..."
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Digital Signal Processing: Spectral Computation and Filter Design (The Oxford Series in Electrical and Computer Engineering)
Chi-Tsong Chen

Excerpt - page 198: "... we can use either (5.6) or (5.11). FIR and IIR Filters A digital system is called a finite-impulse-response (FIR) system or filter if ..."
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Nonlinear Digital Filters: Principles and Applications (The International Series in Engineering and Computer Science)
Ioannis Pitas and Anastasios N. Venetsanopoulos

Binary Polynomial Transforms and Non-linear Digital Filters (Pure and Applied Mathematics (Marcel Dekker))
S. Agaian, Jaakko Astola, and Karen Egiazarian

Excerpt - page 173: "... output Y from the input X, i.e. Y = G[X]. Digital filters operate in discrete time and amplitude, that is, X and ..."
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Passive, Active, and Digital Filters
Wai-Kai Chen

Digital Filter Designer's Handbook: With C++ Algorithms
C. Britton Rorabaugh

An Engineer's Guide to Fir Digital Filters
Nicholas John Loy

Two-dimensional Digital Filters (Electrical and Computer Engineering)
Wu-Sheng Lu

Excerpt - page 68: "... where f(0, 0) = f((l+, 0+) 3.4 THE SAMPLING PROCESS Digital filters and digital signal processing in general owe their widespread applications ..."
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Digital Filters and Signal Processing... with MATLAB Exercises
Leland B. Jackson

Excerpt - page 1: "... spectra of sonar, radar, biomedi- cal, and instrumentation signals with filter algorithms in comput- ers, following ... processing, why is its title "digital filters and signal processing"? Because, to be ..."
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Perfect Digital Photography
Jay Dickman and Jay Kinghorn

Excerpt - page 188: "... see that warmer light, which has been enhanced by the filter, and will pump up the ... you. With the advent of digital, the photographer now has some filtration that can be introduced ..."
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Feedback-Based Orthogonal Digital Filters Theory, Applications, and Implementation (The International Series in Engineering and Computer Science)
Mukund Padmanabhan

Digital Filters and Signal Processing
Leland B. Jackson

Signal Analysis: Wavelets, Filter Banks, Time-Frequency Transforms and Applications
Alfred Mertins

Excerpt - page 161: "... the lifting steps can easily be chosen to yield linear-phase filters. Both lattice and lifting structures are very attractive fir the implementation of filter banks on digital signal processors, because coefficient quantization does not affect the PR ..."
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The Scientist & Engineer's Guide to Digital Signal Processing
Steven W. Smith

Excerpt - page 6: "... the teeth and lips. Vocal tract simulators operate by generating digital signals that resemble these two ... excitation signal through a digital filter with similar resonances. This approach was used in one of ..."
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An Introduction to Parametric Digital Filters and Oscillators
Mikhail Cherniakov

Excerpt - page 1: "... 1 Introduction: Basis of Discrete Signals and Digital Filters The theory and practice of digital signal processing (DSP) are ..."
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Selective Linear-Phase Switched-Capacitor and Digital Filters (The International Series in Engineering and Computer Science)
Hussein Baher

Digital Filters Design for Signal and Image Processing (Digital Signal and Image Processing series)
Najim Mohamed

Wave Digital Filters (Ellis Horwood Series in Digital and Signal Processing)
Stuart Lawson and Ahmad Mirzai

Digital Filters and Their Applications (Techniques of physics)
V. Capellin

Digital Filters: Theory and Applications
N. K. Bose

Pipelined Adaptive Digital Filter (The International Series in Engineering and Computer Science)
Naresh R. Shanbhag and Keshab K Parhi

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