First slide

Transistor

Question

Current gain in CB configuration of a transistor is 0.95. What is the power gain in CE configuration of this transistor if the input resistance is $3 Ω$ and load resistance is $24 Ω$ ?

Moderate

A

196
B

2816
C

2888
D

1428

Solution

$α = 0 .95 ∴ β = \frac{α}{1 - α} = \frac{0 .95}{1 - 0 .95} = 19$
$∴ A_{Power} = (\frac{R_{L}}{R_{i}}) β^{2} = (\frac{24}{3}) {(19)}^{2} = 2888$

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