tolerance scheme容限图 Figure depicts the typical representation of the tolerance limits associated with approximating an ideal lowpass filter lHer(in)l tolerance scheme discrete-time 1+6 容限图 H(e°) 1-61 continuous-time 1+1 Passband i Transition Stopband Passband i Transition W=QT 6 he/=h 011 tolerance scheme 容限图 tolerance scheme 容限图 ◆Figure depicts the typical representation of the tolerance limits associated with approximating an ideal lowpass filter. w T =  continuous -time discrete-time ( ) eff jw w H H j T e   =    