% error: [n,wp] = ellipord(wp,ws, rp,rs) % % Calculate the order for the elliptic filter (discrete) % wp: Cutoff frequency % ws: Stopband edge % rp: decibels of ripple in the passband. % rs: decibels of ripple in the stopband. % % References: % % - Lamar, Marcus Vinicius, Notas de aula da disciplina TE 456 - Circuitos % Analogicos II, UFPR, 2001/2002.