VARIABLE EQUALIZERS 



235 



ep+* 



-J 1 1 1 Lji 1 1 I I I < I 



0.5 1.0 1.5 2.0 2.5 3.0 3.5 



Wp 

 Fig. 3 — The simplest type of symmetrical variable equalizer. 



Fig. 4 — Adjustment of the variable characteristic by the addition 

 of an auxiliarj' network. 



