R S H(jo) H(S)= L R L LO Wo S H(S)= g O-s+0 2s H(s)= 2+2s+102 10 2 ( ) 2    s s s H s H( j) 2 0 2 ( )       s Q s s Q H s o o L LC R s s L R s H s 1 ( ) 2   