KLECTKOXIC Ki:i>.\Y TlOSTKlt 



931 



C02" 



1 + K 



X 



and tlierefore 



(3) 



This expression for Y may be substituted in (2) giving: 

 E 1 1 



Em.. VQ'Y^ + 1 



For .v/K ^ 1 (4) may be written: 



E 



1 + Q' 



(4) 



K 



^l + K^Q.(lZ^' 



(5) 



Equation (5) gives the ^'oltage across the rectifier as a function of 

 probe separation and the product KQ. It can be used to determine the 

 optimum values of: (1) K the ratio of variable to fixed oscillator capaci- 

 tance, (2) the Q of the coupling impedance, and (3) the range of probe 



10 20 30 40 50 60 70 80 90 



ARMATURE DISPLACEMENT AT STOP PINS IN MILS 



Fig. 4 — Typical out])ut voltage versus disiilaccmcnt curvo of tlio electrostatic 

 gauge. 



