Annamalai University 2008-4th Sem B.E Computer Science and Engineering , 2010 __ (computer science and ENGINEERING) _ __ (ESTER)__ _ COEC-401 _ ELECTRONICS CIRCUI
ELECTRONIC CIRCUITS
TOTAL MARKS:60
TIME : 3HOURS
TOTAL UNIT:5
TOTAL PAGES:5
ans any 1 FULL ques. from every unit.
every ques. is divided into sub part 'a' and 'b'.
Register Number:
Name of the Candidate :
B.E. DEGREE EXAMINATION, 2008
(COMPUTER SCIENCE AND ENGINEERING)
(FOURTH SEMESTER)
COEC - 401. ELECTRONIC CIRCUITS AND SYSTEMS
May ] [ Time : 3 Hours
Maximum : 60 Marks
Answer any ONE full question from each unit.
UNIT -1
1. (a) What is meant by PIV rating of a diode ?
What is its importance ? (4)
(b) Explain the operation of a bridge rectifier. Also, derive an expression for rectification efficiency and Transformer utility factor.(8)
2. (a) Compare series and shunt type voltage
regulators. (3)
(b) With a suitable diagram, explain the operation of a switched mode regulator.(9)
3. (a) What is a Darlington pair amplifier ? (3)
(b) Explain the operation of a transformer coupled amplifier. (9)
4. (a) Distinguish CLASS-A from CLASS-B
amplifiers. (3)
(b) Derive expressions for power dissipation and conversion efficiency of a CLASS-A push-pull amplifier. (9)
5. (a) Define the term Input offset current of an
OP-AMP. (3)
(b) Suggest a suitable technique for Input offset current in an OP-AMP. Explaine its operation. (9)
6. (a) Draw the circuit of an OP-AMP based
V to I converter. (4)
(b) Draw the circuit of an OP-AMP peat detector and explain its operation. (8)
UNIT - IV
7. (a) Draw and explain the operation of an
OP-AMP based Schmidt Trigger. (9)
(b) State the applications of a zero crossing detector. (3)
8. (a) Define Lock - in range and capture range
of a PLL. (4)
(b) Explain the astable operation of a 555 Timer with necessary circuit diagram and waveforms. (8)
UNIT - V
9. (a) How an inverted R-2R ladder type DAC
differs from simple R-2R ladder type DAC.
(b) With suitable diagrams, explain the operation of an inverted R-2R Ladder type DAC.(9)
10. (a) What is the conversion time and resolution of an 8 bit successive approximation type ADC driven by a 1 MHz Clock. The internal reference voltage is 5 V. (4)
(b) Explain the operation of a dual slope ADC.
(8)
Register Number:
Name of the Candidate :
B.E. DEGREE EXAMINATION, 2008
(COMPUTER SCIENCE AND ENGINEERING)
(FOURTH SEMESTER)
COEC - 401. ELECTRONIC CIRCUITS AND SYSTEMS
May ] [ Time : 3 Hours
Maximum : 60 Marks
Answer any ONE full question from each unit.
UNIT -1
1. (a) What is meant by PIV rating of a diode ?
What is its importance ? (4)
(b) Explain the operation of a bridge rectifier. Also, derive an expression for rectification efficiency and Transformer utility factor.(8)
2. (a) Compare series and shunt type voltage
regulators. (3)
(b) With a suitable diagram, explain the operation of a switched mode regulator.(9)
3. (a) What is a Darlington pair amplifier ? (3)
(b) Explain the operation of a transformer coupled amplifier. (9)
4. (a) Distinguish CLASS-A from CLASS-B
amplifiers. (3)
(b) Derive expressions for power dissipation and conversion efficiency of a CLASS-A push-pull amplifier. (9)
5. (a) Define the term Input offset current of an
OP-AMP. (3)
(b) Suggest a suitable technique for Input offset current in an OP-AMP. Explaine its operation. (9)
6. (a) Draw the circuit of an OP-AMP based
V to I converter. (4)
(b) Draw the circuit of an OP-AMP peat detector and explain its operation. (8)
UNIT - IV
7. (a) Draw and explain the operation of an
OP-AMP based Schmidt Trigger. (9)
(b) State the applications of a zero crossing detector. (3)
8. (a) Define Lock - in range and capture range
of a PLL. (4)
(b) Explain the astable operation of a 555 Timer with necessary circuit diagram and waveforms. (8)
UNIT - V
9. (a) How an inverted R-2R ladder type DAC
differs from simple R-2R ladder type DAC.
(b) With suitable diagrams, explain the operation of an inverted R-2R Ladder type DAC.(9)
10. (a) What is the conversion time and resolution of an 8 bit successive approximation type ADC driven by a 1 MHz Clock. The internal reference voltage is 5 V. (4)
(b) Explain the operation of a dual slope ADC.
(8)
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Attachment: |
| Earning: Approval pending. |
