GATE 2020: Analog Circuits Rapid Mini Mock (App update required to attempt this test)

An amplifier has a mid-frequency gain A₀ = 100, an upper cut-off frequency f_H = 40 kHz, and a lower cut-off frequency f_L = 20 Hz. For a feedback transfer ratio β = 0.1, find the upper cut-off frequency (in kHz) with negative feedback.

The input bias currents of the given op-amp are I_B1 & I_B2. If V_s=0V then Determine the value of V₀ (in mV). Given I_B1=250nA, I_B2= 500nA, R=500Ω and R₁=50kΩ? (Assume op-amp is ideal).

Study the circuit shown in the figure below. The circuit is constructed to increase the value of driving output current of the circuit. It contains of three transistors with β₁ = 50, β₂ = 100 and β₃ = 20. The biasing circuit is omitted for the simplicity but it is confirmed that all the three transistors are occupied in active region with negligible effect of base width modulation. If the input current to the first transistor is 10 μA, then the value of output current (I_out) will be (in A).

Find the voltage across C₂ (V₀= xV_S).

Write the value of x.

For a differential amplifier shown below.


Calculate input impedance z_in

The CMOS circuit shown below implements the logic function

The stabilization factor (S), for the circuit shown below is

Consider the circuit shown in figure below:

The output current of the op-amp is 2 mA. If the transistor current gain β = 80, then the value of resistance R is equal to ________Ω. Given that V to I ratio at R is 60 when transistor is off.