STUPIDSID
Solve any five questionQ.1(a,b,c,d,e,f)
1(a)
Comapare series ans shunt voltage regulators
5 M
1(b)
Differentiate between two transistor(BJT) and three transistor (BJT) current sources
5 M
1(c)
What is cross-over distortion? How it is overcome.
5 M
1(d)
Derive expression for the output voltage of differentiator.
5 M
1(e)
BJT has parameters fT=200MHz at IC=1.5mA, β=200, Cμ=0.2pF. Calculate bandwidth fβ and capacitance Cπof BJT.
5 M
1(f)
Draw and explain in brief frequency response of Common Emitter Amplifier.
5 M
2(a)
In the common-base circuit shown in Fig 2a, the transistor parameters are β=100, VBE(on)=0.7V, VA=∞, Cπ=10pF and Cμ=1pF. i) Determine the higher cut off frequencies corresponding to the input and output portions of the equivalent circuit. ii) Calculate the small signal mid band voltage gain.
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10 M
2(b)
For the circuit in Fig 2b, the transistor parameters are Kn=1mA/V2,VTN=0.8V, Cgs=2pF and Cgd=2pF. Determine: i) the Miller Capacitance ii) the higher cut-off frequency iii) the mid band voltage gain
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!mage
10 M
3(a)
Draw circuit diagram of two Common Emitter Amplifier (CE-CE) and derive expression for overall voltage gain, current gain, input resistance and output resistance using hybrid-π equivalen circuit.t
10 M
3(b)
The transistor parameters for the circuit shown in Fig 3b are β=100, VBE(on)=0.7V, and VA=∞. i) Determine RE such that IE=150μA. ii) Find differential gain Ad, Common Mode gain Ac for one sided output at Vo2.
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!mage
10 M
4(a)
Explain working of first order low pass filter with help of circuit diagram and also derive expression for its voltage gain and cut-off frequency.
10 M
4(b)
Explain working of transformer coupled Class-A power Amplifier and derive expression for its efficiency.
10 M
5(a)
Draw circuit diagram of subtractor using OpAmp and derive expression for its output voltage.
10 M
5(b)
Draw the circuit diagram of MOSFET based differential amplifier and derive expression of differential voltage gain, common mode gain, and CMRR.
10 M
6(a)
Darlington Configuration
5 M
6(b)
Transistorized series regulator
5 M
6(c)
Widlar Curren sources
5 M
6(d)
Cascode Amplifier
5 M
6(e)
Class AB Power Amplifier
5 M
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