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Analog circuits miscellaneous

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Analog circuits miscellaneous
  1. In the circuit shown in the figure, if CMRR of the OP-AMP is 60dB, then magnitude of the v0 is

    1. 1 mV
    2. 2 mV
    3. 100 mV
    4. 200 mV
Correct Option: C

υ_ = (2)
R
 = 1 V , υd = 0
2R

VCM =
υ+ + υ_
 = 1
2

υ0 =
RF
VCM
1CMRR

Here, CMRR = 60 dB = 103
∴ υ0 =
100
1
 = 100 mV
1103


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