• Antelope Release 5.9 Mac OS X 10.13.2 2019-05-01

 

NAME

filter_designer - design a digital time domain filter

SYNOPSIS

filter_designer [-dbname dbname]

DESCRIPTION

filter_designer is a GUI that can be used to design digital time domain filters in Antelope. The digital filters used in Antelope are specified through the generalized wffil(3) library. In particular, this program will allow the user to specify the filters in wffilbrtt(3) through a set of stages. Once the stages are specified, then the filter's amplitude and phase frequency responses can be computed as well as a time domain impulse responce. In the frequency response plots, the red functions are the responses obtained by evaluating the Z-domain representation of the filter and the blue functions are the responses obtained by evaluating the S-domain representation of the filter. The difference in the responses is due to the standard bilinear S to Z mapping used in Antelope (see several good Wikipedia articles on bilinear S to Z mapping).

A standard Antelope response file can be read and converted into wffil stages. This is done using the response file dialog in the Stages menu. Only pole and zero stages are processed.

COMMAND LINE ARGUMENTS

SEE ALSO

wffil(3)
wffilbrtt(3)

AUTHOR

Danny Harvey
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