Analog and Digital Electronics - Online Test
Q1. The logical gate implemented using the circuit shown below where. V1 and V2 are inputs (with
0 V as digital 0 and 5 V as digital 1) and Vout is the output is
Answer : Option B
Explaination / Solution:
So, this logic level o/p is showing the functionality of NOR-gate.
Q2. 
The transfer characteristic for the precision rectifier circuit shown below is (assume ideal OP-AMP and practical diodes)
Answer : Option B
Explaination / Solution:
Q3. 
The second harmonic component of the periodic waveform given in the figure has an amplitude of
Answer : Option A
Explaination / Solution:
No Explaination.
Q4. 
Consider the common emitter amplifier shown below with the following circuit parameters:
The resistance seen by the source vs is
Answer : Option B
Explaination / Solution:
Q5. 
The TTL circuit shown in the figure is fed with the waveform X (also shown). All gates have equal propagation delay of 10ns. The output Y of the circuit is
Answer : Option A
Explaination / Solution:
No Explaination.
Q6. 
For the operational amplifier circuit shown, the output saturation voltages are ± 15V. The upper and lower threshold voltages for the circuit are, respectively.
Answer : Option B
Explaination / Solution:
Q7. 
The circuit shown in the figure has an ideal opamp. The oscillation frequency and the condition to sustain the oscillations, respectively, are
Answer : Option D
Explaination / Solution:
By virtual ground property, we write
We equate imaginary part to zero, i.e.
The condition to sustain the oscillation is
Q8. When a “CALL Addr” instruction is executed, the CPU carries out the following sequential operations internally:
Note:
(R) means content of register R
((R)) means content of memory location pointed to by R
PC means Program Counter
SP means Stack Pointer
Answer : Option D
Explaination / Solution:
No Explaination.
Q9. 
In the following a stable multivibrator circuit, which properties of V0(t) depend on R2?
Answer : Option A
Explaination / Solution:
The R2 decide only the frequency.
Q10. The following Karnaugh map represent a function F.
A minimized form of the function F is
Answer : Option B
Explaination / Solution:
No Explaination.
