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C1134 Pages 2

amplifier with bypass capacitor and derive the expression for upper cut off
frequency.
With neat diagram derive the expression for frequency of oscillation of wien
bridge oscillator.
Derive the expression for upper cut off frequency of a common collector amplifier
using high frequency hybrid 7 equivalent model.
Explain Hartley oscillator with neat diagram.
PART ^

Answer any two full questions, each carries20 marks.
With neat diagram explain the working of monostable multivibrator. Derive the
expression for period of the monostable multivibrator.
What are the factors affecting the variation in output voltage of voltage regulator?
With a circuit diagram, explain how load and line regulations are achieved in a
shunt voltage regulator.
Explain class B power amplifier. Show that the maximum conversion efficiency of
the idealized class B push pull amplifier is 78.5%
Determine W/L ratio of a MOSFET amplifier which is biased in such a way that
7050-2737, Vt= 1۷ and pCox = 0.3 mA/V? for a drain current 2mA.
Determine gm for enhancement type MOSFET if Vt= 3۷ and it is biased at
11050581, Assume Cox W/L=0.2x107mA/V?
With neat diagram explain bootstrap sweep circuit. Derive an expression for its
retrace period.
How even harmonics are eliminated in push pull operation of power amplifiers?
Derive expression for voltage gain and output impedance for a common source

amplifier using small signal model in mid frequency.

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