For a CE-transistor amplifier, the audio signal voltage across the collected resistance of 2 kΩ is 2 V.

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asked Jan 11, 2018 in Physics by sforrest072 (157,439 points) 61 410 949
For a CE-transistor amplifier, the audio signal voltage across the collected resistance of 2 kΩ is 2 V. Suppose the current amplification factor of the transistor is 100, find the input signal voltage and base current, if the base resistance is 1 kΩ.

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answered Jan 11, 2018 by mdsamim (213,225 points) 5 10 15
selected Jan 11, 2018 by sforrest072
 
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Collector resistance, RC = 2 kΩ = 2000 Ω
Audio signal voltage across the collector resistance, V = 2 V Current amplification factor of the transistor, β = 100
Base resistance, RB = 1 kΩ = 1000 Ω
Input signal voltage = Vi
Base current = IB
We have the amplification relation as:

Therefore, the input signal voltage of the amplifier is 0.01 V. Base resistance is given by the relation:

Therefore, the base current of the amplifier is 10 μA.

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