19.
14.
16.
16.

17.

18.
19.
20.
21.
22.
28.

24.

26.
26.

27.

28.

2 70386

2

Compare

7 `೮ half wave and full wave rectifier. ,
enti .

on the essentials of a biasing circuit.

What 16
do you understand by single stage transistor amplifier 1

Explain frequency response.
Simpl;
implify the expression Y = A-B-C+B- C.
(7x 2 = 14 marks)

Section C (Paragraph Type)
Answer any five questions.

Each question carries 4 marks.

Explain AND function with a 2- input AND gate.
a transformer coupling ?

What are upper and lower side frequencies in AM.

How will you get frequency response comparable to RC coupling in

Briefly explain the working of a Hartley Oscillator.
Explain the operation of transistor as an amplifier.
teristics of a transistor ? What is its

How will you draw d.c. load line on the output charac

importance ?
Why are transistor amplifiers always operated above knee voltage region ?
(5 x 4 = 20 marks)

Section D (Problems)

Answer any four questions.
Each question carries 4 marks.

A CE-connected transistor has B = 50 and Ip = 201A. Compute the values of I, and Ip.
A transistor has the following ratings : I yy_,)= 500 mA and B ,,,, = 300. Determine the maximum

allowable value of I, for the device.
An amplifier has a voltage gain of 182 and B = 100. Determine the power gain and output power

of the amplifier if the input power is 50,W.
A certain amplifier has voltage gain of 15 dB. If the input signal voltage is 0.8V. What is the

output voltage ?