FILTER CONSTITUTION HAVING LINEAR PHASE CHARACTERISTIC AND METHOD FOR DEVELOPING THE FILTER CONSTITUTION

摘要

PROBLEM TO BE SOLVED: To provide a filter constitution having linear phase characteristics which is constituted by cascade-coupling the first filter F1 and the second filter F2.;SOLUTION: The first filter F1 is an analog or a digital filter designed so that its amplitude characteristics match a previously prescribed amplitude specifications. The second filter F2 is mounted as the anti cause/effect version of an imaginary digital full-pass filter APF designed so that its phase characteristics is equal to the phase characteristics of the first filter F1 including the linear function of a frequency.;COPYRIGHT: (C)2001,JPO