PRESENT STATUS OF TRANSISTOR DKVKLOl'M HXT 



i;-;i 



only the slope given in Fig. 21. For linear applications such as the 

 grounded base amplifier, the Class A power gain is approximately pro- 

 portional to a'r^ ; hence the gain of such an amplifier will stay essentially 

 constant within a db or two oxer the temperature range from — 40°C 

 to +80°C. For pulse applications, and of importance to dc biasing with 

 point-contact transistors, is the fact that the dc collector current (for 

 fixed emitter current and collector voltage) will change at about the 



;ioo 



, 90 



I 



I 80 



t 



I 



70 

 i 



: 60 

 i 



I 



• 50 

 i 



40 

 30 

 20 



TEMPERATURE IN DEGREES CENTIGRADE 



Fig. 22 — Collector resistance and a versus temperature for type A transistor 



rCjIOO 



^ 80 



20 30 40 50 60 70 80 90 



TEMPERATURE IN DEGREES CENTIGRADE 



Fig. 23 — Collector resistance and a versus temperature for type M1729 transistor. 



