362 



THE BELL SYSTEM TECHNICAL JOURNAL, APRIL 1951 



J 



REAL W 



X Xx 

 X * 



-X 1 (- 



\l 



xf 



REAL p 



(a) p-PLANE 



(b) W- 



Fig. 23 — Delay equalizer singularities and assigned contour; (a) in ^-plane, (b) mapped 

 on ^e^•plane. 



Fig. 24— Curve for integrated charge as function of 6 and its approximation by step 

 functions. 



