350 Solved Electrical Engineering Problems: For the FE/PE Exams in Electrical Engineering
By Edward Karalis

2.3: Bipolar junction transistor

2.3 Bipolar junction transistor

The NPN bipolar junction transistor (BJT) circuit shown in Figure 2.3 uses a voltage divider bias circuit. Find the voltage drop across the transistor using ? = 30 and V be = 0.7 volts. Assume that the transistor is not in saturation.


Figure 2.3: Bipolar junction transistor

Solution

V CE = V CC ? V L ? V E = 15 ? I C(R C + R E)

V CE = 15 ? 1 10 ?3(5.570 10 3) = 15 ? 5.57 = 9.43 volts

Copyright Dearborn Financial Publishing, Inc. 2004 under license agreement with Books24x7
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Category: Small-Signal Bipolar Transistors (BJT)

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