Subject Code: 141101
GUJARAT TECHNOLOGICAL UNIVERSITY
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SEMESTER-IV(OLD) - EXAMINATION - SUMMER 2019
Subject Name: Advance Electronics
Time: 02:30 PM TO 05:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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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 p 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]
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(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,
(1) Derive equation of Base Spreading resistor rb'b in terms of hie. [07]
(i1) Explain the validity of hybrid p model. [07]
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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]
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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.
(1) Draw equivalent circuit of Op. Amp. and explain significance of each component. [07]
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(i1) 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 slope A/D converter in detail. [07]
(b) Explain DTL in detail. Also draw two input DTL NOR gate. [07]
OR
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Q.5 (a) Explain TTL in detail. Also draw two input TTL NAND gate. [07]
(b) Explain weighted resistor type DAC in detail. [07]
Date: 17/05/2019
Total Marks: 70
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This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University
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