Analog and Digital Electronics - Online Test
Q1. Consider the given circuit.
In this circuit, the race around
Answer : Option A
Explaination / Solution:
Q2. 
The filters F1 and F2 having characteristics as shown in Figures (a) and (b) are connected as shown in Figure (c).
The cut-off frequencies of F1 and F2 are f1 and f2 respectively. If f1 < f2 the resultant
circuit exhibits the characteristics of a
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. The saturation voltage of the ideal op-amp shown below is ±10V. The output voltage v0 of
the following circuit in the steady-state is
Answer : Option A
Explaination / Solution:
Q4. The output Y of a 2-bit comparator is logic 1 whenever the 2-bit input A is greater than the 2-bit input B. The number of combinations for which the output is logic 1, is
Answer : Option B
Explaination / Solution:
Q5. A temperature in the range of −40˚ C to 55˚ C is to be measured with a resolution of 0.1˚ C. The
minimum number of ADC bits required to get a matching dynamic range of the temperature sensor
Answer : Option B
Explaination / Solution:
Q6. The state transition diagram for the logic circuit shown is
Answer : Option D
Explaination / Solution:
Q7. A 2-bit flash Analog to Digital Converter (ADC) is given below. The input is 0 ≤ VIN ≤ 3 Volts.
The expression for the LSB of the output B0 as a Boolean function of X2, X1, and X0 is
Answer : Option A
Explaination / Solution:
Q8. In the circuit shown below, Q1 has negligible collector-to-emitter saturation
voltage and the diode drops negligible voltage across it under forward bias. If Vcc is +5V, X and Y are digital signals with 0V as logic 0 and Voc as logic 1, then the
Boolean expression for Z is
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. For the circuit shown below, taking the opamp as ideal, the output voltage Vout in terms of the input
voltages V1 , V2 and V3 is
Answer : Option D
Explaination / Solution:
Q10. 
The clock frequency applied to the digital circuit shown in the figure below is 1kHz. If the initial state of the output of the flip-flop is 0, then the frequency of the output waveform Q in kHz is
Answer : Option B
Explaination / Solution:
No Explaination.
