a)

b)

a)

b)
0)

a)

b)

a)

b)

0)

a)

b)

a)

b)

0)

02000EC205092003

PART ‏تا‎

Answer any two full questions, each carries 15 marks.
Explain various feedback topologies with neat sketches and derive the
expressions for input and output impedances for all configurations.
Draw high frequency equivalent circuits of BJT and discuss Miller effect..
From the high frequency equivalent circuit, derive the expression for beta cut off
frequency of a bipolar transistor. Draw the frequency response for short circuit
current gain.
Draw the circuit diagram of a tuned amplifier and explain its working
Write short notes on cascade amplifers with a neat sketch.
Draw the circuit diagram of RC phase shift oscillator. Derive an expression for
the frequency of oscillation.
Draw circuit diagrams of the feedback amplifier circuits using voltage series
feedback and current series feedback.

PART C

Answer any two full questions, each carries 20 marks.
Draw the circuit diagram of a transistor bootstrap generator and explain its
working. What are its applications?
Explain various types of biasing methods used for MOSFET amplifiers.
Draw the small signal equivalent circuit of the MOSFET.
Explain the working of monostable multi-vibrator with a neat circuit diagram and
relevant waveforms.
Explain the working of transistor-based series voltage regulator with a neat
circuit diagram.
Explain the working of transformer coupled Class A power amplifier with a neat
circuit diagram and collector waveforms. Derive the expression for collector
efficiency.
Draw and explain the hysteresis curve in Schmitt Trigger.
How short circuit protection is achieved in series voltage regulator? Explain with

a neat circuit diagram.

Page 2 of 2

(9)

(6)

(8)

(4)
(3)
(9)

(6)

(10)

(6)

(4)

(10)

(10)

(10)

(5)
(5)