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Think of bandpass as a hpf and lpf cascaded together with appropriate cutoff frequencies. Navan --- mao mu <> wrote: > Hi > My target filter is a bandpass analog filter. With > N=7, cheby1 returns a 14th B(s), A(s). > But if the target is a LPF or HPF, the results are > 7th order B(s),A(s). > Could somebody explain why bandpass filter design > using cheby1 doubles the order > on B(s) and A(s)? > Thanks > maomu > > > ------------------------ Yahoo! Groups Sponsor > > _____________________________________ > Note: If you do a simple "reply" with your email > client, only the author of this message will receive > your answer. You need to do a "reply all" if you > want your answer to be distributed to the entire > group. > > _____________________________________ > About this discussion group: > > To Join: > > To Post: > > To Leave: > > Archives: http://www.yahoogroups.com/group/matlab > > More DSP-Related Groups: > http://www.dsprelated.com/groups.php3 > > ">http://docs.yahoo.com/info/terms/ __________________________________ |