Sec. 10.26] 



GEIGER-MULLRR COUNTERS 



337 



proportional to the average rate of incidence of random or periodic pulses 

 [25-28]. A successful counting-rate meter circuit is shown in Fig. 94 and 

 described in principle below [27,28]. 



INPUT I 

 O 



OUTPUT 

 O 



_n_n_ 



Fig. 92. Pulse-mixing circuit. 



Fig. 93. Diode pulse-mixing circuit. 

 Rev. Sci. Instruments, 18, 551 (1947).] 



OUTPUT 

 O 



n_n_n 



[B. Rowland, C. A. Schroeder, and V. P. Shipman, 



Amplified pulses from a counter are fed into a conventional multivibrator 

 which serves as a pulse equalizer by providing an output pulse uniform in 

 size and shape and positive in polarity for each input pulse. The equalized 

 pulses are then impressed on the grid of the vacuum tube of the integrating 

 circuit which contains a resistive-capacitive tank circuit in series with its 

 plate. The d-c voltage developed across the RC circuit is proportional to 



