Hello There, Guest! RegisterLogin with Facebook
Login with Facebook

Anna University (UG / PG) Nov/Dec 2015 and Jan 2016 Theory , Practical Exam Timetable
>>> Anna University May June 2015 Last Date for Review of Answer Script (Phase 1)
Anna University Fifth Semester (R2013) Question Bank Collection for All B.E and B.Tech Departments
Anna University Internal Assessment Schedule for Nov./Dec. 2015 Examinations (UG/PG Odd Semesters)
>>> Anna University Chennai B.E./B.TECH/B.Arch All Semester Syllabus Regulation 2013
>>> Anna University Question Papers : April May June 2015 Question Papers | Nov Dec 2014 and Jan 2015 Question Papers
>>> Anna University Study Materials for all Departments

Register or Login to Submit Study Materials , Shoutbox and also to access Many Features !!

Vidyarthiplus Premium Lecture Notes

EC 2205 Electronic Circuits- I Nov / Dec 2011 Question Paper
#1


Anna University

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Third Semester

Electronics and Communication Engineering

EC 2205 — ELECTRONIC CIRCUITS — I

(Regulation 2008)


Time : Three hours

Maximum : 100 marks

Answer ALL questions.

PART A — (10 × 2 = 20 marks)
1. What are the types of transistor biasing?
2. Differentiate bias stabilization and compensation techniques.
3. Why are common emitter amplifiers more popular?
4. Determine the output voltage of a differential amplifier for the input voltages of 300 ? V and 240? V. The differential gain of the amplifier is 5000 and the value of the CMRR is 100.
5. Mention the effect of coupling capacitors on the bandwidth of the amplifier.
6. Short circuit common Emitter current gain of transistor is 25 at a frequency of 2 MHz if = 200 ? f KHz. Calculate (a) T f (b) fe h .
7. List the disadvantages of pushpull amplifier.
8. Define Harmonic distortion and intermodulation distortion.
9. Write down the expression for ripple factor of L filter in FWR.
10. Distinguish between line regulation and load regulation.

PART B — (5 × 16 = 80 marks)

11. (a) For a circuit shown in fig. 1, = 20 CC V V, R = k C 2 ? =50 , = 0.2 BE V V, R = 100 k 1 , =100 E R . Calculate B I , CE V , C I and stability factor S . (16)

Or

(b) With the help of neat diagram, explain methods used in biasing the FET and MOSFET. (16)

12. (a) (i) Compare CB, CE and CC amplifiers and their uses. (8)

(ii) Consider a single stage CE amplifier with R = k S1 and R = k L 1.2 . Calculate i A , i R , v A , i A , power gain and o R if h k ie = 1.1 , 4 2.5 10 ? = × re h , =50 fe h and h A V oe = 25 ? / . (8)

Or

(b) Discuss in detail methods of increasing input impedance using Darlington connection and Bootstrapping. (16)
13. (a) Explain in detail with neat diagram frequency response of BJT amplifier. Discuss the significance of cut off frequencies and Bandwidth of the amplifier. (16)

Or

(b) (i) Derive the expression for frequency response of multistage amplifier. (10)
(ii) Discuss the significance of cut off frequencies and Gain bandwidth product of amplifier. (6)

14. (a) A power transistor operated in class A operation delivers a maximum of 5W to a 4 ohms load with the supply voltage of 20 V. The quiescent operating point is adjusted for a symmetrical swing.
Calculate,
(i) Step down turns ratio.
(ii) Peak collector current.
(iii) Co-ordinates of quiescent operating point.
(iv) Efficiency. (16)

Or

(b) Draw the circuit diagram of class B push pull amplifier and discuss its merits. (16)

15. (a) Draw and explain working of Halfwave rectifier circuit. In a half wave rectifier circuit, diode has an internal resistance 20  and 110 V rms source of supply. Calculate

(i) Efficiency of rectification.
(ii) Ripple factor.
(iii) Percentage regulation from no load to full load. (16)

Or

(b) Explain working of
(i) Switched mode power supply. (8)
(ii) Power control using SCR. (8)
Use neat diagrams.

For the student , by the student , to the student !!



Possibly Related Threads...
Thread Author Replies Views Last Post
  EC6304 Electronic Circuits - I May June 2015 Question Paper kavi 0 844 14-05-2015, 10:23 AM
Last Post: kavi
  EC2205 Electronic Circuits-I April May 2015 Question Paper(Type Version) Anandec 1 657 03-05-2015, 12:46 PM
Last Post: Aravindhan Manogaran
  EC2251 Electronic Circuits II Nov Dec 2014 Qus Paper - Type Version Anandec 1 1,111 28-11-2014, 05:53 PM
Last Post: Srini
  EC2205 Electronic circuits 1(Reg2008) Nov Dec 2014-Type version Anandec 0 802 19-11-2014, 12:46 AM
Last Post: Anandec
  EC2205-Electronic Circuits - I May/June 2014 Question Paper-Scan Version SriNee 2 942 15-11-2014, 10:58 PM
Last Post: Srini
  EC 2205 Electronic Circuits-I Nov/Dec 2013 Question Paper Type Version Bheem 1 2,408 11-12-2013, 08:36 AM
Last Post: nesan
  EC6304 / EC2205 Electronic Circuits I All Question Paper Collection V SIVA 2 15,901 10-11-2013, 09:14 PM
Last Post: Bheem
  EC2205 Electronic Circuit 1 May/June 2013 Question Paper-Type version SriNee 1 7,550 14-10-2013, 08:38 PM
Last Post: nesan
  EC2204 - Signals and Systems - Apr / May 2011 question paper (scanned version) SRM 1 11,287 11-06-2013, 06:17 PM
Last Post: Srini
  EC 2205 ELECTRONIC CIRCUITS — I April / May 2011 Question Paper (Scan version) Dhilipkumar 1 5,823 11-06-2013, 06:02 PM
Last Post: Srini
Reply

Conclave15 - National Level Technical Symposium - Department of Computer Science


Subscribe


Recommend on Google


Latest Threads
-> Medical Radiation Physics April 2012 Question Paper
Forum : Dr. M.G.R. Educational and Research Institute Question Paper
Last Post : yogesh yogib
-> Happy Birthday yogesh yogib
Forum : Birthday Wishes
Last Post : yogesh yogib
-> GATE Mechanical Engineering (ME) Scanned Study Materials - All Subjects
Forum : GATE Mechanical Engineering (ME) Study Materials
Last Post : Gowtham Prapakar
-> Medical Radiation Physics September 2010 Question Paper
Forum : Dr. M.G.R. Educational and Research Institute Question Paper
Last Post : yogesh yogib
-> Medical Radiation Physics May 2011 Question Paper
Forum : Dr. M.G.R. Educational and Research Institute Question Paper
Last Post : yogesh yogib
-> GATE Exam : All Subject Names with respective Subject Codes
Forum : Gate Section
Last Post : Srini
-> A National Level Building Information Modeling & Real Time Problem Solving Conte...
Forum : Civil Department Events
Last Post : aravint krna
-> Management Process and Organisation Theory December 2014 Question Paper
Forum : Annamalai University December 2014 Question Papers
Last Post : nesan
-> English Composition and Business Correspondence December 2014 Question Paper
Forum : Annamalai University December 2014 Question Papers
Last Post : nesan
-> Social Psychology December 2014 Question Paper
Forum : Annamalai University December 2014 Question Papers
Last Post : nesan
-> Indian Social Institutions December 2014 Question Paper
Forum : Annamalai University December 2014 Question Papers
Last Post : nesan
-> History Of Social Thought December 2014 Question Paper
Forum : Annamalai University December 2014 Question Papers
Last Post : nesan
-> Elements Of Social Research December 2014 Question Paper
Forum : Annamalai University December 2014 Question Papers
Last Post : nesan
-> Vector Calculus And Linear Algebra December 2014 Question Paper
Forum : Annamalai University December 2014 Question Papers
Last Post : nesan
-> GATE 2016 Notification , Important Dates , Syllabus and Study Materials
Forum : Gate Section
Last Post : Srini