Simple FIR Digital Filters On the other hand as o increases fromo to T, the magnitude of the zero vector decreases from a value of 2 the diameter of the unit circle. to o Hence, the magnitude response Ho(e )l is a monotonically decreasing function of o from a=0too=兀 Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 4 Simple FIR Digital Filters • On the other hand, as w increases from 0 to p, the magnitude of the zero vector decreases from a value of 2, the diameter of the unit circle, to 0 • Hence, the magnitude response is a monotonically decreasing function of w from w = 0 to w = p | ( )| 0 jw H e