344 THE BELL SYSTEM TECHNICAL JOURNAL, MARCH 1954 



c^AMr 



-wv — T — vw 



(a) 



T 

 I 



— v\\- 



X jo; 



— 0— — X- 



LOW-PASS 



(b) 



X jU 



-® X Or 



HIGH-PASS 



(C) 



AAV 



-Q- 



X jcy 



BANDPASS X 



I 



Cd) 



I 



-&■ 



BAND ELIMINATION 



JO) 



Fig. 12 — Non-inductive active filters. 



