OPERATION OF THERMIONIC VACUUM TUBE CIRCUITS 43S 



factor, yL, the plate resistance, Vp, and the i^rid resistance, Vg 

 from (1) 



dip 



'dEg __ dEp 

 ~~dE, 



-I ^^ , 



[ (by definition) 



Thus, 



Hence 



where 



(7) 



rp 

 1 



Po = 



rp 



rp dEg rp dEp rp^ 



p _ 1 9m rp' 



rp dEp rp^ 



P,= - 



rp' 



' dEp 



(8) 



In similarly treating the 7"'s, it was found convenient to introduce an 

 entirely new symbol. This has been done with reluctance, for it is 

 realized that considerable difficulty has been experienced in the 

 standardization of symbols already in use. But inasmuch as the 

 simplification of both physical interpretation and mathematical 

 expression which results from the use of this new symbol is enormous, 

 its addition is believed to be warranted. 



This new symbol we will call the reflex factor, and will denote it 

 by the symbol, v. It is analogous in its efi'ect on the grid circuit to 

 the effect of n on the plate circuit. Its definition is analogous to that 

 of ju. Thus, from (2) : 



dEp 

 dEa 



(9) 



