InterviewSolution
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InterviewSolution
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For a CE- transistor amplifier , the audio signal voltage across the collected resistance of 2 k Omega is 2 V . Suppose the current amplification factor of the transistor is 100 , find the input signal voltage and base current , if the base is 1 k Omega. |
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Answer» Solution :`V_(o) - 2V , R_(C) =2 K OMEGA = 2000 Omega , I_(B) = ? , V_(i) = ? , r_(i) = 1 k Omegabeta = 100` `V_(o)= I_(C) xx R_(C) , I_(C) = (V_(B))/(R_(C)) = (2)/(2000) = 10^(-3) A = 1 m A` `A_(V) = (V_(o))/(V_(C)) = BETA ((R_(C))/(r_(i)))` `V_(i) = V_(o) , (r_(i))/(beta R_(C)) = (2 xx 1)/(100 xx 2) = 0.01 V ` `beta = (I_(C))/(I_(B)) , I_(B) = (I_(C))/(beta)= (1)/(100) = 10^(-2) mA` |
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