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Discussion :: Analog Electronics

  1. If the differential voltage gain and the common mode voltage gain of a differential amplifier are 48 dB and 2 dB respectively, then its common mode rejection ratio is

  2. A.
    23 dB
    B.
    25 dB
    C.
    46 dB
    D.
    50 dB

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    Answer : Option C

    Explanation :

    We know that CMMR =

    20 log (CMMR) = 20 log Ad - 20 log Ac = 48 - 2 46 dB.


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