STUPIDSID
Solve any question 4 Q1(a,b,c,d,e,f)
1(a)
For the circuit given below, the transistor parameter are Vp=-3.5ν,
IDSS=18mA and λ=0. Calculate VGS and VDS.
!mage
IDSS=18mA and λ=0. Calculate VGS and VDS.
!mage
5 M
1(b)
The small- signal parameters of the NMOS transistor in the source follower circuit shown in fig. below are gm=5mA/V and ro= 100kΩ Determine the voltage gain and output resistance.
!mage
!mage
5 M
1(c)
Design a diode clamper to generate a steady- State output voltage Vo from the input voltage Vi in fig. Shown below if diode is Ideal.
!mage
!mage
5 M
1(d)
For the circuit shown, determine RE such that the emitter current is limited to IE=1mA, Also find IB (Given α=0.9920)
5 M
1(e)
Describe the channel length modulation effect and define the parametersλ.
5 M
1(f)
Draw a neat circuit diagram of emitter follwer configuration and its hybrid-πmodel.
5 M
2(a)
Determine the following for the network given below
i) Q-point
ii) Av,
Ai,
Zi,
Zo.
!mage
i) Q-point
ii) Av,
Ai,
Zi,
Zo.
!mage
10 M
2(b)
Explain the working of Wein Bridge oscillator. Derive the expression for frequency of oscillation and condition of oscillation.
10 M
3(a)
Draw output waveform for clipper and clamper circuits shown.
!mage
!mage
10 M
3(b)
Explain construction and characteristics of n-channel Depletion MOSFET. Draw transfer characteristics and drain characteristics.
10 M
4(a)
Find ICQ and VCEQ for the circuit shown in figure if β=100
!mage
!mage
10 M
4(b)
For the circuit in fig. Let β=100,
VA=100V,
VBF(on)=0.7V. Determine
i) Small signal voltage gain
ii) Input resistance seen by the signal source
iii) Output resistance
!mge
VA=100V,
VBF(on)=0.7V. Determine
i) Small signal voltage gain
ii) Input resistance seen by the signal source
iii) Output resistance
!mge
10 M
5(a)
For the amplifier circuit shown below
i) Determine the values of Kp such that VSDQ=6V
ii) Determine the resulting value of IDQ and small voltage gain.
!mage
i) Determine the values of Kp such that VSDQ=6V
ii) Determine the resulting value of IDQ and small voltage gain.
!mage
10 M
5(b)
Draw circuit diagram of common source amplifier with voltage divider bias with unbypassed source resistance 'Rs' using n-channel EMOSFET. Derive expression for voltage gain, input resistance and output resistance.
10 M
Write short note on any four Q6(i,ii,iii,iv,v)
6(i)
Energy band diagram of MOS capacitor
2 M
6(ii)
Construction and operation of Schottkydiode
2 M
6(iii)
Crystal Oscillator
2 M
6(iv)
Hybrid parameters
2 M
6(v)
Stability factor of biasing circuit.
5 M
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