GATE EE 2015 Set 1 — Question 49
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Analog & Digital Electronics → Operational Amplifiers → Ideal & Non-Ideal Op-Amp
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Question
The op-amp shown in the figure has a finite gain and an infinite input resistance. A step-voltage is applied at the input at time as shown. Assuming that the operational amplifier is not saturated, the time constant (in millisecond) of the output voltage is
Correct answer
(A) 1001
Solution
For an inverting integrator with an op-amp having finite gain , the transfer function is given by:The time constant of this first-order system is:Given:
Substituting the values:Converting to milliseconds:Thus, the correct option is (A).
Substituting the values:Converting to milliseconds:Thus, the correct option is (A).
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