Page 984 - Basic Electrical Engineering

transistor is saturated. At saturated state the level of I will be such that I R
C
C 2
will be equal to V for which V = 0. The transistor will operate as a
CE
CC
closed switch between the collector and emitter.

Figure 14.23 (a) Off state of a BJT; (b) on state of a BJT

Example 14.4 What minimum input voltage level is required to switch a
BJT into saturation (on state) when V = 10 V, R = 16 kΩ, R = 6.2 kΩ
1
CC
2
and β = 20 in an n–p–n CE configuration BJT.
dc

Solution:

V = I R + V CE
CC
C 2
for V = 0
CE