336 



BELL SYSTEM TECHNICAL JOURNAL 



From the examination of these cases it is evident that in the design of a 

 harmonic generator of the type here considered the decision as to the pulse 



TABLE 1 

 Hamionic Content of Rectangular and Trapezoidal Pulses Shown in Figure 4 



0.06 

 0.05 

 0.04 



0.03 



0.01 

 0.008 



0.006 

 0.005 

 0.004 

 0.003 



40 60 80 100 120 140 



HARMONIC NUMBER (n) 



Fig. 5 — Harmonic content of multivibrator wave 



(a) Odd harmonics r = 1/2 



(b) Even harmonics r = 1/2 



(c) Odd harmonics t = 1/10 



(d) Even harmonics t = 1/10 



(e) All harmonics r = 



