1 (a)
Design single stage R-C coupled CE audio frequency amplifier employing BC147B BJT to satisfy the following requirements. IAvI?100, S

_{ICO}?10, Load resistor RL=10k? and output voltage Vo=3volts.
15 M

1 (b)
For the designed amplifier in part (a) determine; expected voltage gain, input impedance, output impedance and current supplied by source voltage V

_{CC}{Use complete h-model for part(a) and (b) }
5 M

2 (a)
Design single stage R-C coupled CS audio frequency amplifier employing JFET BFW-11 to satisfy the following requirements.
|Av|?10, V

_{GSO}=0.3Vp, RL=120? V_{DD}=20 vlts and output peak voltage V_{0}=4.5volts
12 M

2 (b)
For the above designed circuit with source resistor ?R

_{S}? unbypassed determine; voltage gain, input impedance, output impedance and output voltage for input voltage of 20 Vpp.
8 M

3 (a)
For the circuit shown in Fig A. determine the following:
1. Voltage at collector terminal V

_{C}2. Voltage at base terminal V_{B}3. Stability S_{ICO}4. Voltage gain

10 M

3 (b)
For the network of Fig B. With RD=2k2, RS=0.68k? and V

_{DD}=20volts determine the following: 1. I_{DQ}and V_{GSQ}2. V_{DSQ}and V_{D}3. V_{G}and V_{S}4. I_{DQ}if R_{S}is bypassed by capacitor C_{S}

10 M

Compare the following (Any Four)

4 (a)
Output characteristics of CE and CS amplifier

5 M

4 (b)
BJT series and BJT shunt voltage regulator

5 M

4 (c)
D-MOSFET and E-MOSFET

5 M

4 (d)
SCR and TRIAC

5 M

4 (e)
LC and C-L-C filter

5 M

5 (a)
Design a full wave rectifier dc supply using centre tapped transformer with two diodes to give dc output voltage at 300 volts to a variable resistive load. The load current expected is 75 ± 25 mA with ripple factor not to exceed 0.07. Use C-L-C filter.

12 M

5 (b)
For the network of Fig C with RD=2K?, RG=10M?, and VDD=12volts.Determine the following:
1. I

_{DQ }2. V_{DSQ}

8 M

6 (a)
Describe the operation of BJT series regulator and derive an expression for line regulation(Sv) and load regulation (Ro)

12 M

6 (b)
Explain with the help of a circuit diagram the working of a UJT relaxation oscillator.

8 M

Explain the following (any four)

7 (a)
Self thermal stability of JFET

5 M

7 (b)
Utility of h- parameters

5 M

7 (c)
Graphical determination of FET parameters

5 M

7 (d)
Features of IGBT

5 M

7 (e)
BJT as a Switch

5 M

7 (f)
Power MOSFET

5 M

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