Simple FIR Digital Filters Lowpass Fir digital Filters The simplest lowpass Fir digital filter is the 2-point moving-average filter given by H)=(1+=-2) z+1 2z The above transfer function has a zero at z=-l and a pole at z=0 Note that here the pole vector has a unity magnitude for all values of o 3 Copyright C 2001, S K. MitraCopyright © 2001, S. K. Mitra 3 Simple FIR Digital Filters Lowpass FIR Digital Filters • The simplest lowpass FIR digital filter is the 2-point moving-average filter given by • The above transfer function has a zero at and a pole at z = 0 • Note that here the pole vector has a unity magnitude for all values of w z z H z z 2 1 1 1 2 1 0 + = + = − ( ) ( ) z = −1