B.E-B.E Computer Engineering BASIC ELECTRONICS(Karunya University, Coimbatore-2012)

Reg. No. ________                                                                                                                                                   

Karunya University

(Karunya Institute of Technology and Sciences)

(Declared as Deemed to be University under Sec.3 of the UGC Act, 1956)

 

End Semester Examination – November/ December - 2012

 

Subject Title: BASIC ELECTRONICS                                                                                                          Time: 3 hours

Subject Code:            09EC218                                                                                                               Maximum Marks: 100          

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

Answer ALL questions

PART – A (10 x 1 = 10 MARKS)

 

1.         What are N-type semiconductors?

2.         Define PIV of a diode.

3.         Input impedance of an ideal op-amp is _______ (High / Moderate / Low / Zero).

4.         What are the advantages of integrated circuits?

5.         What are the universal gates?

6.         Convert (363)₁₀  to Hexadecimal.

7.         Define modulation.

8.         What is a Varactor diode?

9.         List any two advantages of Fiber optic communication.

10.       Name any two-satellite launch vehicles.

 

PART – B (5 x 3 = 15 MARKS)

 

11.       Draw the V-I characteristics of PN junction diode and explain.

12.       What are inverting and non-inverting amplifiers?

13.       Draw the circuit symbol and truth table of Ex-OR gate.

14.       Differentiate between AM and FM techniques.

15.       Write a note on different types of optical fibers.

 

PART – C (5 x 15 = 75 MARKS)

 

16.       Draw the constructional details of an N-channel FET and explain its characteristics.

(OR)

17.  With a neat circuit diagram, explain how an NPN transistor works in a common emitter configuration.

 

18.       a.         Draw the circuit diagram of an Integrator and explain its working.                                                  (8)

            b.         Explain the ideal characteristics of an operational amplifier.                                                             (7)

(OR)

19.       Discuss the various fabrication techniques used in fabrication of monolithic ICs.

 

20.       Draw the circuit diagram of a 4 X 1 multiplexer and explain its operation.

(OR)

21.       Draw the block diagram of a digital computer and explain its working.

 

22.       Draw and explain the basic blocks of a communication system.

(OR)

23.       a.         With a neat circuit diagram, explain how a balanced modulator works.                                            (8)

            b.         Write a note on AM envelope detector circuit.                                                                                                          (7)

 

24.       With a neat block diagram, explain how a superheterodyne receiver works?

(OR)

25.       Write a detailed note on satellite communication.

Earning:  ₹ 5.25/-