Download GTU BE/B.Tech 2019 Winter 3rd Sem New 2130305 Analog Circuits I Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 3rd Sem New 2130305 Analog Circuits I Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 2130305 Date: 3/12/2019

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) Define biasing and state the need for biasing. 03
(b) Draw and explain half wave and full wave rectifier. 04
(c) Draw and explain output characteristics of CE configuration. 07

Q.2 (a) State different configurations of BJT. Define ? and ? of a transistor. 03
(b) Compare JFET with BJT 04
(c) Explain the operation of JFET and derive the drain and transfer
characteristics.
07
OR
(c) With neat diagram explain the operation of MOSFET in Enhancement
mode and derive its current equations
07
Q.3 (a) The transistor has IE= 10 mA and ? = 0.98. Find the value of base and
collector currents.
03
(b) Draw the V-I characteristics curve of MOSFET. Explain each parameter. 04
(c) Draw and explain the various types of negative feedback connection. 07
OR
Q.3 (a) Give the pin-diagram of IC 741 and illustrate the concept of virtual
ground. List out the ideal characteristics of Op-amp.
03
(b) Define: 1) Input offset Voltage 2) Input offset Current 3) Slew Rate 4)
CMRR
04
(c) Draw the circuit diagram of op-amp Integrator and derive an expression
for the output in terms of the input.
07
Q.4 (a) What is the need for an instrumentation amplifier? List the features of the
instrumentation amplifier.
03
(b) Draw the subtractor circuit using op-amp and mention its applications. 04
(c) With neat diagram explain Sample and hold circuit. 07
OR
Q.4 (a) Explain the voltage to current converter. 03
(b) With the help of a block diagram, explain the various stages present in an
operational amplifier
04
(c) Design Phase shift Oscillator so that F0 = 200 Hz. 07
Q.5 (a) Give any four application of Comparator. 03
(b) Explain the working of Log amplifier with the help diagram. 04
(c) Design Wein Bridge Oscillator so that F0 = 965 Hz. 07
OR
Q.5 (a) What is the difference between normal rectifier and precision rectifier? 03
(b) Draw and explain the circuit diagram of a peak detector. 04
(c) Draw and explain the circuit diagram for Inverting comparator as Schmitt
trigger for R1 = 100ohm, R2 = 56kohm, Vin= 1vpp Sinewave. Determine
the threshold voltage and draw the output waveform.
07
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