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Analog electronics circuits miscellaneous

Analog Electronic Circuits

  1. In the circuit shown below the input offset voltage and input offset current are Vio = 4 mV and Iio = 150 nA. The total output offset voltage is:


    1. 479 mV
    2. 234 mV
    3. 168 mV
    4. 116 mV
Correct Option: A

Total output offset voltage is given by relation

VOT =1 +
Rf
Vos + Rf. IB
R1

where, VOT = total output offset voltage
Rf = feedback resistance
Vos = input offset voltage
IB = input offset current Now,
VOT =1 +
500
4 × 10–3 + 5000 × 103 × 150 × 10–9
5

VOT = 404 × 10–3 + 75 × 10–3
or VOT = 479 × 10–3 = 479 mV.



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