528 



where 



BELL SYSTEM TECHNICAL JOURNAL 

 Network 12 



mi4 



L11/C21 = L22IC12 = L2i/Cn — RiiRii = R~- 



F 



= e2A = 1010 = 



y 



1 + (1 + m)y 



1 + (1 - m)^/ ' 

 - 1 + a^P 



bj - bsP 



is the total parallel reactance in Zn divided by 2R. 



1. m = coth ^Ao] 



1'. m — tanh ^Aq; 



where Ao is the maximum attenuation at / = and at the internal 

 frequency/ = -yjbi/bs. 

 Attenuation Linear Equation: 



where 



a2- {ylf)h,+fyh = IIP, 

 3;= ± 



7^- 1 



(1 + my - (1 - myF 



and the signs to be taken for y correspond to the particular reactance 

 branches involved, whose signs in order on the frequency scale are 

 -, +, and -. 

 In physical solutions 63 ^ a2&i- 



2y 



II = tan B 



1 - (1 - W2)/ 



