From: utzoo!decvax!harpo!floyd!cmcl2!philabs!sdcsvax!sdccsu3!sdcattb!sdcarl!lin Newsgroups: net.general Title: Elliptic Filter Article-I.D.: sdcarl.3572 Posted: Thu Sep 9 16:46:39 1982 Received: Sat Sep 11 01:16:48 1982 Two software packages are giving me different values of poles and zeros for the same elliptic filter. One of these programs seems to be behaving very weirdly. Will someone with a filter design program try this and send me the poles and zeros for comparison: Order of filter: 5 Passband cutoff: 10 kHz Passband Ripple: 1 dB Minimum attenuation in stopband: 40 dB Thank you. L. Seltzer