GTU BE 2020 Summer Question Papers || Gujarat Technological University
Subject Code: 2130305
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER- III EXAMINATION - SUMMER 2020
Subject Name: ANALOG CIRCUITS-I
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 and explain negative and positive clipper. | 03 |
| (b) List out the application for JFET. | 04 | |
| (c) Draw CE transistor configuration and give its input and output characteristics. Also derive the relation between current gain of CE, CB and CC configuration. | 07 | |
| OR | ||
| Q.2 | (a) Compare MOSFET with JFET. | 03 |
| (b) Derive relationship between adc and ßdc of a transistor. | 04 | |
| (c) What is biasing? Why biasing is required for transistor? List biasing methods for transistor. Draw and explain the circuit of voltage divider biasing | 07 | |
| OR | ||
| Q.3 | (a) Draw and explain P-channel JFET. | 03 |
| (b) What do you mean by feedback? Explain why series voltage feedback connection is mostly used | 04 | |
| (c) Explain series voltage feedback in detail. | 07 | |
| OR | ||
| Q.4 | (a) Draw and explain N-channel D -MOSFET. | 03 |
| (b) Define 1) CMRR 2) Slew Rate 3) Input offset voltage | 04 | |
| (c) Draw the block diagram of an op-amp and write the function of each block in details. | 07 | |
| OR | ||
| Q.5 | (a) Describe the log amplifier using op-amps. | 03 |
| (b) Why open loop configuration is not used for linear applications? Write ideal and practical values of any four characteristics of an op-amp. | 04 | |
| (c) Draw the circuit of a V-I converter and derive an expression for the output current in terms of input voltage | 07 | |
| OR | ||
| Q.5 | (a) What do you mean by oscillator and explain its needs? | 03 |
| (b) Explain the wein bridge oscillator in detail. | 04 | |
| (c) Draw the circuit diagram of differential amplifier using three op-amp and write its output equation. | 07 | |
| OR | ||
| Q.4 | (a) Compare between Schmitt Trigger and Comparator. | 03 |
| (b) Draw the circuit diagram of close loop non-inverting amplifier and derive expression of its voltage gain. | 04 | |
| (c) Draw the circuit diagram of basic integrator and practical integrator and derive expression. | 07 | |
| Q.5 | (a) Draw the circuit diagram for basic triangular square wave generator. | 03 |
| (b) Draw and explain Window detector using IC 741. | 04 | |
| (c) Draw and explain Inverting Schmitt Trigger using IC 741. | 07 |
Date: 29/10/2020
Total Marks: 70
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