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08000CS207122001

PART C
Answer all questions, each carries 3 marks.

In a transistor circuit , load resistance is 51062 and quiescent current is 2mA .
Determine the operating point when the battery voltage is ۷۰۰٣ے‎ 12V.
Differentiate Oscillator from Amplifier.
Describe the effect of cascading in gain and bandwidth of amplifier.
Which circuit is known as ‘free running oscillator’? ? Why?

PART D

Answer any two full questions, each carries 9 marks.

With necessary equations explain the design of potential divider biasing for a
transistor in Common Emitter configuration.
Draw the circuit diagram of a bi-stable multivibrator using transistors and
explain its working.
Design an RC Coupled Amplifier using transistors with the following
specifications :
۷ = 12 V de, Ic =3 mA, hfe = 100, Lower cut off frequency = 100 Hz, Upper
cut off frequency = 100 KHz.

Explain the working of a crystal oscillator with necessary diagrams.

Draw the circuit diagram and explain the working of a common source MOSFET
amplifier.
Draw the circuit diagram and explain the working of Wien bridge oscillator for

an output frequency of 6 KHz.

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