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In the circuit diagram shown in Fig. 4.39 (i), if V_CC = 12V and R_C = 6 kilo-ohms, draw the d.c. load line.

In the circuit diagram shown in Fig. 4.39 (i), if V_CC = 12V and R_C = 6 kilo-ohms, draw the d.c. load line. What will be the Q point if zero signal base current is 20μA and β = 50?

Answers

- The collector-emitter voltage V_CE is given by:
V_CE = V_CC – I_CR_C
When I_C = 0, V_CE = V_CE = 12 V. This locates the point B of the load line. When V_CE = 0, I_C = V_CC /R_C = 12 V/6 kilo-ohms = 2 mA. This locates the point A of the load line. By joining these two points, load line AB is constructed as shown in Fig. 4.39 (ii).
- Zero signal base current, I_B = 20 µA = 0.02 mA Current amplification factor, ß = 50

Wilfykil answered the question on August 15, 2019 at 07:02

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