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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:
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- 479 mV
- 234 mV
- 168 mV
- 116 mV
Correct Option: A
Total output offset voltage is given by relation
VOT = | 1 + | Vos + Rf. IB | |||
R1 |
where, VOT = total output offset voltage
Rf = feedback resistance
Vos = input offset voltage
IB = input offset current Now,
VOT = | 1 + | 4 × 10–3 + 5000 × 103 × 150 × 10–9 | |||
5 |
VOT = 404 × 10–3 + 75 × 10–3
or VOT = 479 × 10–3 = 479 mV.