Download GTU BE/B.Tech 2019 Summer 4th Sem New 2142405 Analog Electronics And Its Applications Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 4th Sem New 2142405 Analog Electronics And Its Applications Previous Question Paper

Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2142405 Date:13/05/2019
Subject Name: Analog Electronics and Its Applications
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.
4. Write only required answer. Avoid writing irrelevant and unnecessary too long
answers.

Q.1 (a) Explain avalanche break down of P-N junction. 03
(b) Draw input and output voltage and current waveforms of Centre tap full wave
rectifier with capacitor filter.
04
(c) Derive the equation of efficiency of Class-C amplifier. 07

Q.2 (a) ?The linear voltage regulator IC LM7805 works like a variable resistor.? Justify
the statement.
03
(b) Draw schematic diagram of shunt regulator using Zener diode. Explain working
of the circuit.
04
(c) Compare CE, CB, CC Configuration of BJT. 07
OR
(c) Draw and explain the hybrid-pi model for a transistor connected in CE
Configuration.
07
Q.3 (a) Draw internal block diagram of op-amp. 03
(b) Explain function of each block of above Q3(a) 04
(c) Define following terms with reference to OPAMP: 1) Input offset voltage 2)
Input bias current 3) PSRR 4) CMRR. Explain Common mode rejection ratio.
07
OR
Q.3 (a) State protections required for input terminals of OPAMP. 03
(b) State types of Analog to Digital Converters. 04
(c) Explain gyrator circuit with neat diagram and mathematical equation. 07
Q.4 (a) Draw internal block diagram of SE 555 IC. 03
(b) Draw monostable multi vibrator using SE 555 IC. Decide component values for
mono- shot with 0.1S pulse width.
04
(c) Draw block diagram of V/F converter and explain the same. 07
OR
Q.4 (a) What is a filter circuit? State types of filter circuit considering frequency
response.
03
(b) Explain phase shift oscillator. 04
(c) Explain second order Butterworth Filter with neat diagram. 07
Q.5 (a) What is DTL? Draw schematic diagram of AND gate using DTL. 03
(b) State 5 names of logic families. 04
(c) Draw schematic diagram of inverting amplifier using switched capacitor circuit.
Explain its working.
07
OR
Q.5 (a) State characteristics of ideal opamp. 03
(b) An opamp circuit has closed loop gain of 10. It is working on +/- 12V DC power
source. The input signal applied is x(t) = 5*sin(100*t). Draw input output
waveform of the circuit. Explain output waveform.
04
(c) Draw schematic diagram of Non-Inverting amplifier using OPAMP. Derive
gain equation of the same. Comment on input impedance of this amplifier.
07
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