Download AKTU B-Tech 2nd Sem 2015-16 101EC Electronics Engineering Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU)) B-Tech 2nd Semester (Second Semester) 2015-16 101EC Electronics Engineering Question Paper

Printed Pages: 6 EC-lOl/EC-ZOI/EEC-ZOI
(Following Paper ID and Roll No. to be ?lled in your
Answer Books)
Roll No.
B.TECH.
Theory Examination (Semester-II) 2015-16
ELECTRONICS ENGINEERING
Time : 3 Hours Max. Marks : 100
Section-A
1. Attempt all parts. (2X10=20)
(a) Compare the properties of Si and Ge Semiconductors.
(b) De?ne depletion layer in a diode.
(0) De?ne bulk resistance of the diode.
((1) Draw the double ended diode clipper circuit.
, _ (1) P.T.O.
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(e) Draw the output waveform appear across RL.
+VCC
Protective
diodes
Figure-l
(f) Consider a constant voltage source with 10 V and series
internal resistance 01 100 ohm. Calculate its equivalent to
a current source.
(g) De?ne Ohmic region in FET.
(11) If (X, of a transistor changes from 0.981 to 0.987, F ind
the percentage change in [3?
(i) Why triggering circuit is needed in CRO?
(j ) List the four speci?cations of unregulated Power Supply.
, (2)
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Section-B
2. Attempt any 5 questions. (10XS=50)
(a) Explain input and output characteristics of the follow-
ing:
(i) Zener Diode
(ii) Varactor Diode
(b) (i) Explain the working of a Common Base circuit
with its circuit diagram.
(ii) What is a well-designed voltage divider biasing
(VDB) circuit?
(c) (i) Explain how the input impedance of an ampli?er
can load down the ac source.
(ii)Exp1ain the Transconductance Curve of a JFET.
r (3) P.T.O.
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(d) (i) Draw the schematic of Self?Biasing JFFT
ampli?er.
(ii) Explain the CMOS inverter circuit working
operation.
(6) EXplain
(i) Integrator circuit using OP-AMP
(ii) Summing Ampli?er using OP?AIVIP
(iii) Zero crossing detector usi?g OPAlVIP
(f) Explain & Calculate the Voltage Gain, Input Impedance
and Bandwidth for an Inverting Negative Feedback
Ampli?er.
(g) Explain the characteristics of Digital Voltmeter
Systems.
(h) (i) Explain all Oscilloscope Controls with one
example.
(ii) How do you measure power supply performance?
Explain.
(4)
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'Section-C
Attempt any two questions. (15X2=30)
3. (i) For a half wave recti?er derive an expression for ripple
factor.
(ii) Explain the function of the circuit of ?g. 2 and draw the
output waveform.
R
??+?/VV\, o 4 4?)
2kg A! 9v;
vm?) G) 15 sin(col) + ? + v.11)
?? a t
Fig-2.
4. (i) Draw the CE con?guration circuit of BJT and
explain its input and output characteristics.
(ii) Describe the working operation of enhancement mode
and depletion mode MOSFET. Also derive an expres-
sion for gm of JFET con?guration.
r (a PTO.
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5. (i) Draw the blockdiagram and equivalent circuit of an
op?amp. Explain ideal characteristics of an op-amp.
(ii) Explain brie?y functions of the following blocks in
CRO :
(a) De?ection Ampli?er
(b) Cathode Rax Tube
(6)
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