The article contains analog circuits questions and answers on Resistor networks, transistor MOSFET, current mirror, Opamp, and RC circuits.

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- τ = RC >> T
- τ = RC << T

3. For the given DAC(Digital to Analog Circuit) circuit shown in the figure. Calculate the value of Vout for the digital input D3D2D1D0 = 1010. if Vref =8V.

4. Find the minimum value of voltage Vx for which the maximum current flows through the resistor R. Assume Vth = 400mV and µnCox = 250.

5. Determine the value of voltage Vout for the given following circuit. What is the possible application of this circuit?

6. Refer to the following circuit and draw the output waveform VA and VB for the given square wave input.

7. Among the following circuits which circuit has the higher output impedance? and Why?

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9. For the given opamp circuit below, if the initial voltage across the capacitors C1 and C2 are 1V and 3V respectively. Find the output voltage Vout.

11. Consider the below-given circuit, if Vout is known then which of the following options will be correct?

- The bias currents will be unknown
- The offset current will be known
- The bias and offset currents will be known.
- None of the above

12. Design a circuit to implement 3V1-V2 using a single operational amplifier where V1 and V2 are the input signal voltages.

14. Refer the following Opamp circuit, If voltage V1 = 5sinwt and saturation voltage Vsat = +/- 15V, Then plot the curve V2 superimposed on V1.

15. Consider the following circuit. If the switch in the circuit is closed for 30 seconds and then it is opened. The output voltage which was initially at 0V becomes -5.4V when the switch is opened. What is the voltage value of the input signal Vi?

18. For the given opamp circuit calculate the upper threshold point UTP and lower threshold point LTP. Given saturation voltage Vsat = +/- 10V.

- MOS devices have high input impedance.
- MOS devices are voltage-controlled devices.
- In MOSFET the storage time of minority carriers is absent.
- MOS devices have a positive temperature coefficient.

22. Plot the output waveforms for the RC circuits shown below.

- Flash type ADC
- Integrating type ADC
- Counter type ADC
- SAR(Successive Approximation Register)-ADC.

27. Draw the output voltage waveform for the given capacitive network.

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28. Consider the given circuits, if the initial voltage across a 1C capacitor is 8V, Then find the individual voltage across all of the capacitors at time t = 0+ and t = infinity. Also, plot the waveform for the currents I1 and I2.