Digital Filter Plus - Filter Designer

Supports:
Windows, macOS and Linux

Finite Impulse Response Filters
Windowing
Parks-McClellan Remez Exchange Algorithm
Hilbert Transform
Raised Cosine
Square Root Raised Cosine
Gaussian

Infinite Impulse Response Filters
Pole Zero Placement
Butterworth
Chebyschev
Inverse Chebyschev
Elliptic
Bessel
Bilinear transform
Matched z-transform
Notch Filters

Digital Filter Plus is an Finite Impulse Response (FIR) and Infinite Impulse Response (IIR) digital filter design program that runs under Windows™ and Linux™.
Digital Filter Plus can be used to design filters for use on both fixed point (Q Format Integer) and floating point devices.

The following screen shots show DFPlus in use:
FIR low pass filter magnitude
FIR low pass filter phase
IIR band pass filter magnitude
IIR band pass filter phase

The following packages include the complete filter design toolset, which can be used for free in demonstration mode.
The demonstration mode does not allow allow the filter coefficients to be saved to disk but this feature is enabled by the purchase of a developer's license.

Digital Filter+ is now open source according to the SigLib license terms and is part of the SigLib DSP and ML library.

Copyright© 2022 Sigma Numerix Ltd.. Permission is granted to create WWW pointers to this document.
SigLib, Digital Filter Plus and Numerix-DSP are trademarks of Sigma Numerix Ltd. All other trademarks acknowledged.