Download GTU B.Tech 2020 Summer 3rd Sem 2130305 Analog Circuits I Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 3rd Sem 2130305 Analog Circuits I Previous Question Paper

Seat No.: ________
Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? III EXAMINATION ? SUMMER 2020
Subject Code: 2130305 Date:29/10/2020
Subject Name: ANALOG CIRCUITS-I
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

MARKS
Q.1 (a) Draw and explain negative and positive clipper.
03

(b) List out the application for JFET.
04

(c) Draw CE transistor configuration and give its input and output
07
characteristics. Also derive the relation between current gain of CE,
CB and CC configuration.

Q.2 (a) Compare MOSFET with JFET.
03

(b) Derive relationship between dc and dc of a transistor.
04

(c) What is biasing? Why biasing is required for transistor? List biasing
07
methods for transistor. Draw and explain the circuit of voltage divider
biasing

OR

(c) Draw and explain P-channel JFET.
07

Q.3 (a) What do you mean by feedback? Explain why series voltage feedback
03
connection is mostly used

(b) Explain series voltage feedback in detail.
04

(c) Draw and explain N-channel D ?MOSFET.
07

OR

Q.3 (a) Define
03
1) CMRR 2) Slew Rate 3) Input offset voltage

(b) Draw the block diagram of an op-amp and write the function of each
04
block in details.

(c) Describe the log amplifier using op-amps.
07

Q.4 (a) Why open loop configuration is not used for linear applications?
03

(b) Write idea
l and practical values of any four characteristics of an op ?
04
amp.

(c) Draw the circuit of a V-I converter and derive an expression for the
07
output current in terms of input voltage

OR

Q.4 (a) Compare between Schmitt Trigger and Comparator.
03

(b) Draw the circuit diagram of close loop non-inverting amplifier and
04
derive expression of its voltage gain.

(c) Draw the circuit diagram of basic integrator and practical integrator
07
and derive expression.
Q.5 (a) Draw the circuit diagram for basic triangular square wave generator.
03

(b) Draw and explain Window detector using IC 741.
04

(c) Draw and explain Inverting Schmitt Trigger using IC 741.
07

1

OR

Q.5 (a) What do you mean by oscillator and explain its needs?
03
(b) Explain the wein bridge oscillator in detail.
04
(c) Draw the circuit diagram of differential amplifier using three op-amp
07
and write its output equation.

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