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Analog circuits miscellaneous

  1. If input signal ei applied to the OP-AMP of the circuit shown in the given figure is sinusoidal at maximum value 1 mV and of 1kHz frequency, then magnitude of the peak value of the output voltage waveform would be _________ mV .
    1. 628
    2. 28
    3. 68
    4. 128
Correct Option: A

0 - ei
=
e0 - 0
1 / jωCR

∴ e0 = -jωC = -RC
dei
dt

Input voltage, ei = 103 ω cos ωt
∴ e0 = – RC × 10– 3 × ω cos ωt
Maximum value of output voltage = RC ω × 10– 3
= 100 × 103 × 1 × 10– 3 × (2π × 1 × 103) × 10– 3 = 628 mV.



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