The Frequency Response In some cases. the magnitude function is specified in decibels as G(o)=20logoH(e)dB where G(o)is called the gain function The negative of the gain function A(0)=-G(0) is called the attenuation or loss function Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 15 The Frequency Response • In some cases, the magnitude function is specified in decibels as where G() is called the gain function • The negative of the gain function is called the attenuation or loss function H e dB j ( ) 20log ( ) 10  G  = A () = −G ()