1216 THE BELL SYSTEM TECHNICAL JOURNAL, NOVEMBER 1952 



rapidly to a high value of current, falls relatively slowly to an inter- 

 mediate value, then shifts rapidly to a small negative value and finally 

 returns slowly to the original value. The emitter current and voltage 

 are sketched in Fig. 8. It is a so-called "single-shot" circuit. Alternately 

 the rest or do stable point can be chosen to be in Region III, at high 

 current, by choice of positive instead of negative bias F„ . Practical 

 considerations as ease in triggering and average power consumption 

 usually indicate a preference for the Region I dc stable point. 



O) 



MONOSTABLE 

 CHARACTERISTIC 



Fig. 7 — Monostable and astable characteristics. 



