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Question : 21
Total: 26
For a CE-transistor amplifier, the audio signal voltage across the collector resistance of 2 k Ω 1 k Ω
Solution:
Calculation of collector current I e I B V i
GivenR e = 2 k Ω
= 2 × 10 3 Ω
V C E = I C R C
I C =
=
A
= 10 − 3 A
= 1 mA
Current gain =
∴ 100 =
∴ I B = 10 − 5 A
Input signal voltage
V i = I B R B
= 1 × 10 − 5 × 10 3 Ω
= 10 − 2 V
[Note : Give full credit if student calculates the required quantities by any other alternative method]
Given
Input signal voltage
[Note : Give full credit if student calculates the required quantities by any other alternative method]
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