GATE ECE 2023 | Operational Amplifier Question 8 | Analog Circuits

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GATE ECE 2023

MCQ (Single Correct Answer)

-0.67

The $$\mathrm{{{{V_{OUT}}} \over {{V_{IN}}}}}$$ of the circuit shown below is

GATE ECE 2023 Analog Circuits - Operational Amplifier Question 14 English

$$ - {{{R_4}} \over {{R_3}}}$$

$${{{R_4}} \over {{R_3}}}$$

$$1 + {{{R_4}} \over {{R_3}}}$$

$$1 - {{{R_4}} \over {{R_3}}}$$

GATE ECE 2023

Numerical

-0

A sample and hold circuit is implemented using a resistive switch and a capacitor with a time constant of 1 $$\mu$$s. The time for the sampling switch to stay closed to charge a capacitor adequately to a full scale voltage of 1 V with 12-bit accuracy is ___________ $$\mu$$s (rounded off to two decimal places).

Your input ____

GATE ECE 2022

MCQ (Single Correct Answer)

-0.67

A circuit with an ideal OPAMP is shown. The Bode plot for the magnitude (in dB) of the gain transfer function (A_v(j$$\omega$$) = V_out(j$$\omega$$)/V_in(j$$\omega$$)) of the circuit is also provided (here, $$\omega$$ is the angular frequency in rad/s). The values of R and C are __________.

GATE ECE 2022 Analog Circuits - Operational Amplifier Question 16 English

R = 3 k$$\Omega$$, C = 1 $$\mu$$F

R = 1 k$$\Omega$$, C = 3 $$\mu$$F

R = 4 k$$\Omega$$, C = 1 $$\mu$$F

R = 3 k$$\Omega$$, C = 2 $$\mu$$F

GATE ECE 2017 Set 2

Numerical

-0

In the voltage reference circuit shown in the figure, the op-amp is ideal and the transistors Q₁, Q₂,….., Q₃₂ are identical in all respects and have infinitely large values of common – emitter current gain $$\beta $$. The collector current (I_C) of the transistors is related to their base emitter voltage (V_BE) by the relation I_C = I_S exp (V_BE/V_T); where I_s is the saturation current. Assume that the voltage V_P shown in the figure is 0.7 V and the thermal voltage V_T=26mV GATE ECE 2017 Set 2 Analog Circuits - Operational Amplifier Question 24 English