Download PTU B-Tech ECE 2020 Dec 4th Sem 57597 Pulse Wave Shaping And Switching Question Paper

Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (ECE)-Electronics And Communications Engineering 2020 December 4th Sem 57597 Pulse Wave Shaping And Switching Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ECE) (2012 to 2017) (Sem.?4)
PULSE WAVE SHAPING AND SWITCHING
Subject Code : BTEC-405
M.Code : 57597
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
Answer briefly :
1.
Differentiate between low pass and high pass wave-shaping circuits.
2.
Draw the response of high pass RC circuit to ramp wave input voltage.
3.
List the applications of clamper circuits.
4.
How does a Schottky Diode can be used for reducing Storage time?
5.
The voltage (Vmsint) applied to a pure inductor, write the output voltage expression and
draw input and output waveform.
6.
What do you mean by a stable multivibrator?
7.
Define resolution time in multivibrator.
8.
If the diode is made from germanium, how it will work as ideal switch?
9.
Name the semiconductor devices that can be used as switch.
10. What is the application of triggering input at the base of ON transistor?
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SECTION-B
11. The figure shows double Clipper circuit. Determine its output waveform. Assume diode
drop of 0.7 V with sinusoidal input with ?20 V. Also VB1 and VB2 are 10V and 8V
respectively.
R
D 1
D 2
Vi
Vo
+
?
V
VB2
B1 ?
+
FIG.1
12. Derive the output equations and draw the output waveforms of a RC high pass circuit for
the pulse wave signals as input.
13. Draw the circuit of bi-stable multivibrator with symmetrical collector triggering and
explain it.
14. Explain the operation of Schmitt trigger with neat sketches, and derive the expressions
for UTP and LTP.
15. What is the response of RL circuit for AC voltage?
SECTION-C
16. What is monostable multivibrator? Explain with the help of neat circuit diagram the
principle of operation of monostable multivibrator, and derive the expression for pulse
width. Draw the waveforms at collector and base of the both transistors.
17. What is diode comparator and describe the application of comparator.
18. Explain any two with necessary diagrams;
a) Operation of a transistor as switch with its switching characteristics.
b) How a low pass circuit acts as an integrator?
c) Series and shunt Clipper
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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