STUPIDSID
1 (a)
Design single stage R-C coupled CE audio frequency amplifier employing BC147B BJT to satisfy the following requirements. IAvI?100, SICO ?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 VCC {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, VGSO=0.3Vp, RL=120? VDD=20 vlts and output peak voltage V0=4.5volts
12 M
2 (b)
For the above designed circuit with source resistor ?RS? 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 VC
2. Voltage at base terminal VB
3. Stability SICO
4. Voltage gain
10 M
3 (b)
For the network of Fig B. With RD=2k2, RS=0.68k? and VDD=20volts determine the following:
1. IDQ and VGSQ
2. VDSQ and VD
3. VG and VS
4. IDQ if RS is bypassed by capacitor CS
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. IDQ
2. VDSQ
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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