500 



BELL SYSTEM TECHNICAL JOURNAL 



Now suppose a second source of conductance Gei exists whose amplitude 

 function is of the form illustrated in Fig. 26a. Let us suppose that for the 



1.0 

 0.9 



LU 



u 



Z 0.8 

 < 



I- 



o 



3 0.7 

 Q 



Z 



o 



O0.6 

 O 



gO.5 

 cr 



'-'04 



_I 

 LU 



,,,0.3 



4.5 

 4.0 

 3.5 

 3.0 

 2.5 

 2.0 

 1.5 

 1.0 

 0.5 



1.0 1.5 2.0 2.5 3.0 



AMPLITUDE OF OSCILLATION IN ARBITRARY UNITS 



NEGATIVE REPELLER VOLTAGE »- 



Fig. 25. — a. Variation of electronic conductance with amplitude of oscillation for an 

 ideal oscillator. The parameter controlling the small signal electronic conductance is the 

 re])eller voltage wl'ich determines the transit angle in the repcilcr region. The horizontal 

 line indicates the load conductance. 



b. The variation of power output witli tlie repeller voltage which results from the 

 characteristics of Fig. 25a. 



value of ^0 assumed tlie phase of this coiukiclaiue is such as to oppose 

 Gel , Gel may or may not be a function of Id. For the sake of simplicity let 

 us assume that G^o varies with \d in the same way as Gei . The total conduc- 



