Download GTU BE/B.Tech 2019 Summer 4th Sem Old 141101 Advance Electronics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 4th Sem Old 141101 Advance Electronics Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(OLD) ? EXAMINATION ? SUMMER 2019
Subject Code:141101 Date:17/05/2019
Subject Name: Advance Electronics
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.

Q.1 (a) Draw the circuit of two stage RC coupled amplifier and explain it in detail. Also
explain the significance of coupling and bypass capacitor.
07
(b) Draw the hybrid ? equivalent circuit of CE amplifier with resistive load and
derive the equation of short circuit Current Gain.
07

Q.2 (a) What do you mean by negative feedback? Enlist the advantages of negative
feedback. Also derive equation of close loop gain in terms of open loop gain.
07
(b) Explain the concept of cascaded amplifier and derive the equation of overall
Gain. Also compare Frequency response of single stage amplifier and cascaded
multistage amplifier.
07
OR
(b) With respect to transistor hybrid ? model,
(i) Derive equation of Base Spreading resistor rb?b in terms of hie.
(ii) Explain the validity of hybrid ? model.
07



Q.3 (a) Draw the Block diagram of various Feedback topology and explain the
significance of each topology.
07
(b) Draw the circuit of Wien Bridge Oscillator and explain it in detail. 07
OR
Q.3 (a) Explain Crystal Oscillator in detail 07
(b) What is difference between and amplifier and Oscillator? Explain the concept
of oscillation with Barkhausen criteria.
07

Q.4 (a) Draw the circuit of Inverting configuration of Op. Amp. and derive the equation
of Close loop gain..
07
(b) Enlist at least six characteristics of Ideal Op. Amp. Also draw Ideal voltage
transfer curve of Op. Amp. and explain it.
07
OR
Q.4 (a) With respect to 741 Op. Amp.
(i) Draw equivalent circuit of Op. Amp. and explain significance of
each component.
(ii) Draw the pin configuration of Op. Amp. IC 741 and explain
significance of each pin.
07
(b) Explain practical way of measuring Slew Rate of Op. Amp. with necessary
Circuit & Waveform.
07

Q.5 (a) Explain Dual slop A/D converter in detail. 07
(b) Explain DTL in detail. Also draw two input DTL NOR gate. 07
OR
Q.5 (a) Explain TTL in detail. Also draw two input TTL NAND gate. 07
(b) Explain weighted resistor type DAC in detail. 07

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