Roll No.
Total No. of Pages : 02
Total No. of Questions : 09
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B.Tech.(Automation & Robotics) (2011 & Onwards) (Sem.-3)
ELECTRONICS DEVICES AND DIGITAL CIRCUITS
Subject Code : BTAR-302
M.Code : 63002
Time : 3 Hrs.
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Max. Marks : 60
INSTRUCTION TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
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SECTION-A
Answer briefly :
- Why is capacitive coupling used to connect a signal source to an amplifier?
- Determine the base current for the CE transistor circuit if Ic = 80mA and B = 170.
- Define the transconductance of MOSFET.
- Give the advantages of switching regulator.
- Define slew rate and its significance.
- Draw the circuit diagram of OP-AMP as an integrator.
- Write the frequency equation for an astable multivibrator.
- Define propagation delay time.
- What is the difference between combinational and sequential circuits?
- What is the difference between Latch and a flip-flop?
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SECTION-B
Q2. Explain the Operation of common drain MOSFET amplifier. Draw and explain its V-I characteristics.
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Q3. Explain the working of CE amplifier. Also draw its V-I characteristics.
Q4. Draw the circuit diagram of Op-Amp as an inverting amplifier and derive the expression for output voltage.
Q5. Minimize the function given below by means of Quine-McClusky method and realize it With NAND gates.
f = S (0,1,2,7,8,9,14) + S f (4,6,12,15)
Q6. With suitable example, design a sequential circuit using JK-flip-flop.
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SECTION-C
Q7. (a) Design a 4-bit ripple counter using negative edge triggered JK flip-flop.
(b) Explain the working principle of dual slope A/D converter.
Q8. Describe the 555IC. Design an astable multivibrator circuit to generate output pulses 25%, 50% duty cycle using a 555 timer IC. With choice C = 0.01µF and frequency as 4.0 KHz.
Q9. Write short notes on any two :
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- Switching regulators
- Schmitt trigger
- V-I converters
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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This download link is referred from the post: PTU B.Tech 3rd Semester Last 10 Years 2011-2021 Previous Question Papers|| Punjab Technical University
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