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A comprehensive collection of RF & microwave resources for wireless communication engineers. Includes tutorials, theory, design aids, circuit diagrams, products, and more.

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Circuit Diagrams
Design - General
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Bandpass Filters - General
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Topics Covered

  • Active Filter Book Reviews
  • Active Filter Books
  • Active Filter Circuit Diagrams
  • Active Filter Designs
  • Active Filter Design Software
  • Active Filter Tutorial
  • Active Filters & Active Filter Circuits
  • Band-Pass (Bandpass) Designs
  • Bessel, Butterworth, Chebyshev Designs
  • Low-Pass (Lowpass) Designs
  • Notch Filter Designs
  • Online Design Tools































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  Book reviews courtesy of Amazon.com.
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Active Filter Books
& Book Reviews

Lancaster's Active Filter Cookbook - By Don Lancaster. (ISBN 075062986)

Active Network Design with Signal Filtering Applications - By Dr. Claude S. Lindquist. Available direct from Lindquist Systems Group or Steward & Sons Publishing.

Design of Analog Filters - By Rolf Schaumann, Mac E. Van Valkenburg. (ISBN 0195118774)


Book Search

Keywords:

Tip: Use the asterisk wildcard symbol to search
for variations on words. Also, don't forget acronym
forms of words. For example, searching on these
two keyword phrases
	pll 
	phase locked loop*
would locate these related books
	PLL Design Guide 
	Phase Locked Loop Design
	Phase Locked Loops
Or, use the Advance Search.


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Active Filter Circuit Diagrams

Active Filter Wizard - Free online program for designing several types of active filters, including low-pass, bandpass, and high-pass, with Bessel, Butterworth, Chebychev, inverse Chebychev, or elliptical passband responses. You can even choose the specific op-amp to use, or a generic, and then plot the resulting frequency response based upon the op-amp characteristics.

The Hardware Book Team - Active Filter Circuits - Includes Bessel, Butterworth, and Linkwitz filters, high-pass and low-pass.

Active Filter Solutions - Actually a brochure for a design program, but shows lots of circuit diagrams..

 

Related Categories: Active Filter Design


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Active Filter Design

Active Filter Design Techniques (PDF) - Gives theory behind the design of active filters. Covers not only the usual Butterworth, Bessel, and Chebychev implementations, but also the Sallen-Key, Twin-T, and Wien-Robinson. (Texas Instruments Application Report SLOA088.)

More Filter Design on a Budget (PDF) - A very handy, concise summary of several active filter designs and types, including low-pass, band-pass, high-pass, band-reject, and notch. Focuses primarily on the Sallen-Key and multiple feedback (MFB) implementations, but also covers the Deliyannis and the Fliege topologies. (Texas Instruments Application Report SLOA096.)

FDI Online Design Guide - Frequency Device's guide to passive, active, and digital filter design techniques.

Active Filter Wizard - Free online program for designing several types of active filters, and plotting the resulting frequency response. Doesn't teach design techniques or theory, but a fun and useful learning tool nevertheless.

 

Related Categories: Active Filter Tutorials


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Active Bandpass Filter Design

Active Bandpass Filters - A tutorial and design example.

 

Related categories: Active Filter Design - General


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Active Bandpass Filter Design - Bessel

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Related Categories: Active Bandpass Filter Design - General


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Active Bandpass Filter Design - Butterworth

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Related Categories: Active Bandpass Filter Design - General


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Active Bandpass Filter Design - Chebyshev

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Related Categories: Active Bandpass Filter Design - General


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Active Low-Pass Filter Design

Active Low-Pass Filter Design - By Jim Karki. Comprehensive overview of the design process, from Laplacian mathematics to final design tables. Covers the Bessel, Butterworth, and Chebyshev realizations in both the Sallen-Key and multiple-feedback (MFB) configurations.. (Texas Instruments Application Report SLOA049A.)

 

Related categories: Active Filter Design - General


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Active Low-Pass Filter Design - Bessel

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Related Categories: Active Low-Pass Filter Design - General


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Active Low-Pass Filter Design - Butterworth

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Active Low-Pass Filter Design - Chebyshev

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Active Notch Filter Design

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Related Categories: Active Filter Design - General


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Active Filter Design - Miscellaneous

Active Filter Design Techniques (PDF) - Gives theory behind the design of active filters. Covers not only the usual Butterworth, Bessel, and Chebychev implementations, but also the Sallen-Key, Twin-T, and Wien-Robinson.

 

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Active Filter Design Software

Active Filter Workshop
Eagleware - A/Filter
FNC - Elcad - General purpose schematic-designer and parts-calculator. Design antennas, LC matching networks, tuned circuits, air and toroidal-core coils, and active filters. Do transmission line calculations, antenna scaling, and all basic electronics calculations.
Nuhertz - Active Filter Solutions - Supports active, passive and digital filter design. Freeware version available.
Number One Systems - Filtech - Both active and passive filter design.
Schematica - Filter Wiz
Sherlab - Filter.exe - Freeware.

 

Related Categories: Online Design Tools


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Active-Filter Online Design Tools

Active Filter Wizard - Free online program for designing several types of active filters, including low-pass, bandpass, and high-pass, with Bessel, Butterworth, Chebychev, inverse Chebychev, or elliptical passband responses. You can even choose the specific op-amp to use, or a generic, and then plot the resulting frequency response based upon the op-amp characteristics.

Active Low-Pass Filter Design and Dimensioning - This free online utility, written in JavaScript, helps you to quickly design an active Sallen-Key or Multiple Feedback topology low-pass filter.

 

Related Categories: Active Filter Design Software


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Active Filter Tutorials

Frequency Response and Active Filters - Introduction to active filters.

A Filter Primer - Maxim's general filter tutorial demonstrating Laplace pole-zero analysis, covering Butterworth, Bessel, Chebychev, Elliptic, and state-variable implementations. Doesn't cover active filters specifically.

FDI Online Design Guide - Frequency Device's comprehensive tutorial for passive, active, and digital filters.

Filter Transfer Functions - Summary of properties for Bessel, Butterworth, and Chebychev filters.

Poles and Zeros - Online interactive program that allows you to move the Laplace poles and zeros of a two-pole filter and view the resulting transfer function (frequency response), and then create a 3D s-domain plot. A fun learning tool.

 

Related Categories: Active Filter Design


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