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FIR Digital Filter Design Applet
This JAVA applet allows you to design an FIR filter and view its characteristics. By choosing a window type, the filter order, and passband, you can design the filter and view its frequency response and get a listing of the coefficients. Source code available.
preview: http://www.dsptutor.freeuk.com   |

demo    

IIR explorer
IIR explorer is a small Windows app to explore digital filters in an intuitive way: move poles and zeros on the complex plane and see in real time how this affects the magnitude and phase response of the filter. Or you can select one of a few simple low pass filter designs and see how the poles move when you change the filter's cutoff frequency and Q factor. The program assumes that you have a basic understanding of digital filters...
preview: http://www.terdina.net   |

freeware    

METEOR FIR Filter Design
This site contains the paper (PostScript format) by K. Steiglitz on the METEOR constrained FIR filter design technique , and has downloads for C and Pascal source code for the METEOR program and its input formatting program.
preview: http://www.cs.princeton.edu   |

demo    

Momentum Data Systems - Digital Filter Design Demos
DSPworks (883 K) Signal analysis and filter testing software QEDesign 1000 (1 M, version 6.3.2) Digital filter design software (optional code generators) QEDesign 2000 (1.1 M, version 6.3.2 Advanced filter design software (inc. code generators) QEDesign Conversion (785 K) Filter design for sample rate conversion QEDesign Multirate (799 K) Multirate digital filter design software
preview: http://www.mds.com   |

shareware    

ScopeFIR Download
ScopeFIR designs Complex Finite-Impulse Response (FIR) filters using the Parks-McClellan algorithm or windowing. You can then mix, scale, quantize, and edit the coefficients of the FIR filter. You may use ScopeFIR free for a 60-day trial period, but you must Register with Iowegian International Corporation in order to use it beyond the trial period. The full licensing terms for the program, plus additional information about Registration can...
preview: http://www.iowegian.com   |

demo    

ScopeFIR Filter Design Tutorial
The following is a brief tutorial on how to use ScopeFIR. After explaining a few things, we design three simple filters, a lowpass, a highpass, and a bandpass. ScopeFIR designs filters using specifications you provide. For designs which use the Parks-McClellan algorithm, ScopeFIR provides two types of filter specification editors.
preview: http://www.iowegian.com   |

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