PRESENT STATUS OF TRANSISTOR DEVELOPMENT 



427 



ill region 1, couditiou (a) above is satisfied. By specifying a maximum 

 slope in region II and III, condition (e) is satisfied. Now refer to the 

 idealized collector family in Fig. 18; by specifying a maximum value 

 to Tf;), it is possible to insure condition (d) and by specifjnnga minimum 

 value for r.,<„ condition (b) can be satisfied. Finally, in Fig. lU 1)}^ de- 



Fig. 16 — Bistable circuit and characteristics showing trigger voltage requirements. 



Fig. 17 — Idealized emitter characteristics — slope = Ru 



