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R.G.P.V. Bhopal (MP)

I.T. (3rd Semester) EXAMINATION

ELECTRONIC DEVICES & CIRCUIT [ IT-304 ]

Time: 3Hrs     Max Marks: 100     Min Marks: 35
Note:Attempt any 5 questions taking 1 question from each unit.All question Carry equal marks.

UNIT-I   

Q.1.(a) With the help of energy band diagram explain the principle of working of tunnel diode ? 10
       (b) Determine the quiescent level of Icq and Vceq for networks of fig :  10                                

OR

Q.2.(a) Explain the principle of working of depletion type MOSFET   ?  10
       (b) With the help of high frequency model of a CE transistor , explain its working ?10

 UNIT-II

Q.3.(a) Derive expression for I/P voltage gain ?10             
        (b) Determine the efficiency of class-A power amplifier?10

OR

Q.4.(a) Explain the principle of working of RC phase shift oscillator  ?  10
       (b) Determine the gain & input-output impedance of voltage series feedback amplifier  ?  10

UNIT-III

Q.5.(a) With the help of timing diagram explain the working of Astable multivibrator  ?  10
       (b) Calculate the differential mode gain ,common mode gain & CMRR using h-parameters ? 10

OR

Q.6.(a) Obtain the output waveform of the circuit shown in fig :  10                                                    
        (b) Explain briefly cascade and cascode amplifiers ?   10

UNIT-IV

Q.7.Explain the following application of OP-AMP  ?   20
            (a) summer
            (b) Interator
            (c) Log Amplifier
            (d) Voltage to current converter

OR

Q.8.(a) With the help of circuit digram explain the working of OP-AMP ,as comparator ?  10
       (b) Explain the briefly about active filters and its types ?  10

UNIT-V

Q.9 (a) Explain the working of series regulator ?  10
       (b) Explain the current limiting circuits ?  10

OR

Q.10 Write shorts notes on following :
          (a) Fixed switching regulator
          (b) UPS

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