problem on bjt SMALL SIGNAL amplifier circuit

Discussion in 'General Electronics Chat' started by munna007, Jun 10, 2010.

  1. munna007

    Thread Starter Active Member

    Jul 23, 2008
    51
    0
    hello friends....this question is from gate 2009 exam.i m unable to solve it....can anybody plz provide me its solution.....

    i have its answer keys only....option D is answer.

    thanks....
     
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    5,448
    782
    The capacitors will have very different reactances at the two frequencies present in the source signal. The low frequency component at 20 rad/sec will be highly attenuated compared with the 10^6 rad/sec component. The assumption then is that only the high frequency component will be discernible at the output.

    So it boils down to either answer C or D.

    You should attempt to estimate the circuit gain at the higher frequency and from that determine which answer would be more reasonable.
     
  3. munna007

    Thread Starter Active Member

    Jul 23, 2008
    51
    0
    thanks for the reply sir....but can u plz tell in detail what u r saying in above lines.
     
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