Question
Physics Question on Semiconductor electronics: materials, devices and simple circuits
For a transistor amplifier in common emitter configuration for load impedance of 1kΩ (hfe=50 and hoe=25mAV−1), the current gain is
A
5.2
B
15.7
C
24.8
D
48.78
Answer
48.78
Explanation
Solution
For a transistor amplifier in common emitter configuration, current gain Ai=1+hoeRLhfe where hfe and hoe are hybrid parameters of a transistor. ∴Ai=1+25×10−6×1×10350=48.78