First slide

Transistors

Question

A common emitter transistor amplifier has a current gain of 20. If the load resistance is $4 k Ω$ and input resistance is $500 Ω$ , the voltage gain of the amplifier is

Moderate

Solution

$V o l t a g e g a i n = A_{V} = β \frac{R_{L}}{R_{i}} = 20 \times \frac{4000}{500} = 160 h e r e β i s c u r r e n t g a i n$

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