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The input resistance of a silicon transistor is Ω Its base current is changed by 15μ A, which results in the change in collector current by 2mA. This transistor is used as a common emitter amplifier with a load resistance of 5k Ω. Calculate current gain (βac) transconductance and voltage gain.
Asked by Topperlearning User | 10 Jul, 2014, 11:09: AM

Here ΔIB = 15μA =15 x 10-6A

ΔIC = 2mA = 2 x 10-3A

Rin = 665Ω, R2 = 5kΩ = 5 x 103Ω

(1) Trans conductance, gm =

(2) Voltage gain (Av) =gmRL= 0.2 x 5 x 103 = 1000

Answered by | 10 Jul, 2014, 01:09: PM

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