Kennard White is the author of X-pole, an interactive analog and digital filter design program. X-pole supports classical analog/digital IIR filter design techniques, pole-zero placement, proportional-integral-differential (PID) feedback control filters, window-based digital FIR filter design, and Parks-McClellan digital FIR filter design. X-pole is a combination of Tcl/Tk code and C routines written by Kennard White. It is currently not supported by the Ptolemy Group, but parts of it may be integrated into the Tycho user interface being developed for the Ptolemy software environment.
Last updated 05/04/98. Send comments to www@ptolemy.eecs.berkeley.edu.