STUPIDSID
1(a)
Explain the purpose of thin and lightly doped base region of BJT structure
5 M
1(b)
List the characteristic feature of 555 timer
5 M
1(c )
Design a circuit with OP-AMP to produce the o/p Vo given by- Vo=(Vs1+Vs3)-(Vs2+Vs4)
5 M
1(d)
Justify how FET can be used as variable resistor, constant source and constant voltage source
5 M
2(a)
Explain the graphical determination of h-parameters using characteristic curve of CE amplifier
10 M
2(b)
Determine the following for the circuit shown in the figure-
(i) IBQ
(ii) ICQ
(iii) VCEQ
(iv) VCQ
(v) VBQ
(vi) VEQ
Use exact and approximate analysis for the same.
10 M
3(a)
Derive equation for Zi, Zo,Av for common source configuration using voltage divider network (with unbypassed RE)
10 M
3(b)
Calculate the voltage gain, input and output impedance for the circuit shown below
10 M
4(a)
Explain any two applications of mono-stable multi-vibrator.
10 M
4(b)
Design a regulator LM 723 for V0=9V and Io=3Amp.
10 M
5(a)
Explain the D/A convertor using binary weighted resistor.
10 M
5(b)
Explain how an op-amp can be used as (i) Integrator(ii) Differentiator
10 M
6(a)
Explain instrumental amplifier with 3 op-amps.
10 M
6(b)
Using IC 555 design A-stable multi-vibrator for output frequency at 5KHz and duty cycle of 70%. Draw the related waveforms
10 M
7(a)
Virtual ground concept of Op-amp
5 M
7(b)
Inverting Schmitt trigger
5 M
7(c )
Properties of ideal Op-amp
5 M
7(d)
PLL
5 M
7(e )
Zero crossing detector
5 M
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