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Analog circuits miscellaneous

  1. Total offset voltage for the circuit shown below with given input offset voltage VIO = 4 mV, and input offset current IIO = 150 mA will be ____ mV.
    1. 97
    2. 479
    3. 145
    4. 432
Correct Option: B

Offset due to VIO = VIO .
R1 + RF
= (4 mV) .
5 + 500
= 404 mV
R15

Offset due to IIO = IIO × RF
= (150 × 10– 9) × 500 kΩ = 75 mV
∴ Total offset = 404 + 75 = 479 mV



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