PRINCIPLES OF TILlNSrSTOR ACTION 



255 



Data taken on the same surface have been plotted in other ways. As the 

 spacing increases, more emitter current is required to produce the same 

 change in collector current. The fraction of the emitter current which is 



0.005 



0.010 0.015 0.020 



SEPARATION IN CENTIMETERS 



0.030 



Fig. 9-— The factor t; is the ratio of the emitter current extrajiolatcd to .? = to that 

 at electrode separation .v retjuired to give the same collector current, /, and voltage, !'«. 

 Plot shows variation of g with s for different /,. The factor is independent of I'c over 

 the range plotted. 



effective at the collector decreases with spacin^^ It is of interest to kee}) 

 Vc and /, fi.xed by varying /, as s is changed and to plot the values of le 

 so obtained as a function of 5. Such a plot is shown in Fig. 9. The collec- 



