a,*300 



c 



-+200 



UT 





'100 

 Q 



Phase 

 shift 



C 



01 



Dl 



a; 



Q 



•100 



■200 



-300 



001/(/.Cy/2 01/(/.C)^^2 



ti/ac)'/2 t 



a/Q for aiQ for 



High -pass Low- pass 



10/(/.C) 



,V2 



lOOAi-C) 



V2 



Graph 27. Phase shift of classical filter section 



c 

 a> 



u t 



0) O 



ill tn 



Govacy^ 



oi/(/.cy^ 



iOAii:j^ 



w increasing — — 

 Graph 28. Terminal impedance of classical filter section 



mALcf^^ 



276 



