Simple FIR Digital Filters The frequency o=@cat which 0 e is of practical interest since here the gang(O) in dB is given by G(Oc)=201ogoH(e/uc) 2010g101 0)-20og0 2=-3dB since the dc gain G(0)=201og. H(e)=o Copyright C 2001, S K. MitraCopyright © 2001, S. K. Mitra 7 Simple FIR Digital Filters • The frequency at which is of practical interest since here the gain in dB is given by since the dc gain w= wc ( ) 2 1 ( ) 0 0 0 j j H e H e c = w ( ) G wc 20log ( ) 20log10 2 3 dB 0 = 10 −  − j H e ( ) G wc 20log ( ) 10 c j H e w = 0 20 0 0 10 ( ) = log ( ) = j G H e