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SPN NO.:
sT. XAVIER'S TECHNICAL INSTITUTE, MAHIM, MUMBAI 400016
DIPLOMA IN ELECTRONICS & TELECOMMUNICATION ENGINEERING
SEMESTER EXAMINATION - SUMMER 2017SEMESTER - III
Timeallowed:3hours Marks - 80
lnstructions : -
1. Answer to the two sections must be written in separate Answer Book/s.
2. lllustrate yoirr answers with neat sketches wherever necessary.
3. Use of Mathematical tables and Pocket calculators (non-programmable) is
permissible.
4. Figures to the right indicate full marks.
5. Assunre suitable additional data, if necessary..** ** *** ***!*:t:F+ +* ++ +* **l.r**.i,* 'trB:i*,8+:t+*** ** f** *
Q. 1. Attempt any FOUR.
a) Draw and explain dual input balanced output differential amplifier.
b) Draw neat circuit diagram of summing amplifier using three different inputs.
Write expression of output voltage.
c) Draw and explain working of precision full wave rectifier using opamp.
d) Compare between active and passive filter (any 4 points).
e) Explain operating principle of VCO (Voltage Control Oscillator). State two
applications.
f) Draw transfer characteristics of PLL. Define lock range and capture range.
Q.2.
t6
Attempt any TWO
With neat diagram describe working of FM demodulator using PLL.
Draw neat block diagram of LM 566 and explain its operation.
For firstorder Butterworth filter, calculate cut off frequency if R=
0.OO1LrF. Also calculate passband gain if Rl=1OKO and RF = 100KO.
circuit diagram of the filter.
a)
b)
c) 10kO and c=
Draw neat
t2
L2Q. 3. Attempt any TWO
a) Draw neat circuit diagram of Wien Bridge oscillator. Design Wien Bridge oscillator
generating output frequency of 2KH.. Assume C= 0.O1pF.
Describe with'neat circuit diagram operation of Log amplifier using opamp.
Draw neat circuit diagram of instrumentation amplifier. State advantages of it.
16Q. 4. Attempt any FOUR.
a) Design monostable multivibrator having output pulse width of 10ms.
b) Explain the operating principle of PLL.
c) Explain and draw any one application of function generator lC-8038.
d) Draw the functional block diagram of lC XR2206.
e) Draw and explain the block diagram of V.C.O. (Voltage Control Oscillator) lC - 566.
f) Explain the application of PLL as frequency demodulator.
Q. 5. Attempt any TWO.
a) Draw and explain the transfer characteristics of PLL.
b) Draw and explain the functional block diagram of lC - 555 as a monostable
multivibrator.
c) Explain and state the expression for lock range, capture range and free running
state.
Q. 6. Attempt any TWO.
a) State apd explain the functions of pins of lC-555.
b) Draw and explain application of PLL as a frequenry multiplier.
c) Drawthe functional block diagram oflC-8038 and state its features.
b)
c)
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ET -153!5 / ET -Lr3L5 / Er - 402-27 Al7
ST. XAVIER,S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO
PH O N E : 24455937 ; 24454559 ; 2445L96t;
01_6
24460359
Coffi{,eftie;t
1) The answers should be
model answer scheme.
words and not as word-to-word as given in the
2) The model answer and the answer written by candidate may vary but the examiner may try
to assess the understanding level of the candidate.
- 3) The language errors such as grammatical, spelling errors should not be given morew
Importance [Not applicable for subject English and Communication Skills.
4) While assessing figures, examiner may give credit for principal components indicated in the
figure. The figures drawn by candidate and model answer may vary. The examiner may give
credit for any equivalent figure drawn.
5) Credits may be given step wise for numerical problems. In some cases, the assumed constant
values may vary and there may be some difference in the candidate's answers and model
answer.
6) In case of some questions credit may be given by judgement on part of examiner of relevant
answer based on candidate's understanding.
7) For programming language papers, credit may be given to any other program based on
, equivalent concept.
Serial No.
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AUTONOMOUS EXAMINATION - SUMMER / WINTER - 20
Course Code: fr- tf3tf CourseName: L.=..Maximum Marks: Pg-ff &AmeAllowedi z hours
examined by key
ST. XAVIER,S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO 016
P H O N E : 24455937 ; 2445 4559 ; 2445t9 6t; 24460359
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ST. XAVIER'S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO 01-6
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PHON E : 24455937 ; 24454559; 2445t96L; 2446{J359
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I ST. XAVIER'S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO 016
PHON E: 24455937; 24454559; 2445196L; 2ffiO359
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ST. XAVIER,S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO 016
P H O N E : 24455937 ; 2445 4559 ; 2445L9 6L; 24460359
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P H O N E : 24455937 ; 24454559 ; 2445t9 6L; 2446O359
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