TRANSISTORS IN SWITCHING CIRCUITS 



1219 



relating to the sensitivity, constancy of s(-nsili\ity, opei'ating currents 

 and \-oltages, interchaugeability and the like re(iiiire a much more 

 quantitative understanding in order to create circuit designs liaving 

 specific properties.* An equal need also exists in transistor design for 

 analytic circuit relationships. Such information is useful first, in the 



(a; 



COLLECTOR BISTABLE 

 CHARACTERISTIC 



(b) 



COLLECTOR MONOSTABLE 

 CHARACTERISTIC 



-Ic 



Rc\ 



-V, 



(c) 



COLLECTOR ASTABLE 

 CHARACTERISTIC 



Fig. 9 — Collector connection switching circuits. 



* See, for example, J. R. Harris, "A Transistor Shift Register and Serial Adder", 

 Proc. IRE, Nov., 1952; R. L. Trent, "A Transistor Reversible Binary Counter", 

 Proc. Inst. Radio Engr., Nov., 1952; H. G. Follingstad, J. N. Shive, R. E. Yaeger, 

 "An Optical Position Encoder and Data Transmitter", Proc. Inst. Radio Etujr., 

 Nov., 1952. 



