Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (ECE)-Electronics And Communications Engineering 2020 December 3rd Sem 57583 Analog Devices And Circuits Previous Question Paper
Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech.(ECE/Electronics Engg)/
(Electronics & Computer Engg) (2012 to 2017) (Sem.?3)
ANALOG DEVICES & CIRCUITS
Subject Code : BTEC-301
M.Code : 57583
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
4 .
Any missing data can be a ssu med appropriate ly .
SECTION-A
Write briefly :
Q1. State the Barkhausen criteria for oscillator.
Q2. Why negative feedback employed in high gain amplifiers?
Q3. Draw the hybrid model of CE, CB and CC BJT's.
Q4. What is thermal run-away?
Q5. Compare Zener breakdown and Avalanche break down.
Q6. Define Reverse Leakage Current of Diode.
Q7. Calculate Ic and IE for a transistor that has dc= 0.99 and IB = 150A. Determine the value
of dc for the transistor.
Q8. Why it is required to have a stable Q-point of an amplifier?
Q9. What is the value of Ripple factor for half wave and full wave rectifier?
Q10. What is the Miller Effect?
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SECTION-B
Q11. Explain briefly the working of Hartley oscillator.
Q12. In a Class C amplifier with 1MHz signal frequency, determine the suitable tank circuit
component values. Calculate the max AC power delivered to the load if VCEmax = 0.5V,
Vcc = 30V, RL = 1.2k.
Q13. Derive an expression for the overall gain of voltage series feedback amplifier.
Q14. Explain construction, operation and characteristics of JFETs.
Q15. Draw and explain the complementary symmetry amplifier and discuss its advantages.
SECTION-C
Q16. Define H-Parameters. Derive expression for following of CE amplifiers using h-parameters
a) Voltage gain
b) Current Gain
c) Input Resistance
d) Output Resistance
Q17. Draw and explain the working of R-C phase shift oscillator and also derive an expression
for its frequency of oscillations.
Q18. Explain working of push pull amplifier.
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 post was last modified on 13 February 2021