GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-1V (NEW) EXAMINATION - WINTER 2018
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Subject Code:2142405 Date:28/11/2018Subject Name:Analog Electronics and Its Applications
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Define followings. [03]
(1) PIV (2) Q- point (3) Noise Figure.
(b) Define the following. [04]
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(1) CMRR (ii) PSRR (iii) Slew Rate (iii) Noise(c) Draw an IC OP Amp in block diagram form. Identify each stage by function. [07]
Q.2 (a) Draw Equivalent Circuit of OP-amp. [03]
(b) Enlist Ideal Op-Amp characteristics. [04]
(c) Compare CE, CB, and CC configuration in tabular form. [07]
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OR
(c) Draw & Explain Full wave Bridge Rectifier circuit. Also derive expression for output frequency. [07]
Q.3 (a) State the advantages of TTL. [03]
(b) Explain the construction of AND logic gates using discrete components like diode, resistor, Transistor etc. [04]
(c) Explain working of successive-approximation ADC with suitable numerical example. [07]
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OR
Q.3 (a) Explain in brief Zero Crossing Detector. [03]
(b) What is need of Schmitt trigger circuit? Enlist & explain comparator characteristics. [04]
(c) Compare DTL, TTL & RTL in tabular forms. [07]
Q.4 (a) Explain in brief block diagram of linear regulated power supplies. [03]
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(b) Write a technical note on: Negative Impedance converter. [04]
(c) Explain bistable multivibrator using 555. Give necessary equations and draw neat figures and waveforms. [07]
OR
Q.4 (a) Explain 78xx and 79xx voltage regulators. [03]
(b) Compare AC and DC equivalent circuit. [04]
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(c) Explain with neat sketches F/V converter. [07]
Q.5 (a) A single stage transistor amplifier has a voltage gain of 600 without feedback and 50 with feedback, calculate the percentage of output which is feedback to input. [03]
(b) Explain Switched Capacitor Filter circuit in detail. [04]
(c) Draw and Explain single stage CE amplifier circuit. What is role of CE, Cc, and Cin in single stage CE amplifier circuit? [07]
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Q.5 (a) What is Barkhausen criterion? The tuned collector oscillator makes use of an L-C tuned circuit with L=29.3uH and C=450pF. determine frequency of oscillation. [03]
(b) List out the advantages of negative feedback. [04]
(c) Explain Summing, Scaling and Averaging Amplifier circuit with necessary equation and neat sketches. [07]
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