Thursday, January 13, 2022

Dr.A.P.J.Abdul Kalam University BE III SEM ALL BRANCH DEC 2020 Analog Electronics [EX-223] Dec - 2020 Question Paper

Dr.A.P.J.Abdul Kalam University Old Question Papers

Bachelor of Engineering

Third Semester Main Examination, Dec-2020

Analog Electronics [EX-223]

Page [3]

Branch: EX

Time: 3:00 Hrs Max Marks 70

Note : 1. Attempt any five questions out of eight.

2. All questions carry equal marks.

Q.1 (a) What is P-N junction? Expalain its characterstics?

(b) What is Schottky diode? Explain its characterstics?

Q.2 (a) Explain Zener diode and Varactor diode with symbols, Tunnel diode, PIN diode?

(b) What is half-wave rectifier & full-wave rectifier?Draw and explain its expression waveform.

Q.3 (a) Explain gain-bandwidth constant relationship and Define Thermal runaway Condition in BJT.

(b) Explain (a)voltage multiplier circuit.(b) Clipper and clamper circuit

Q.4 (a) Explain biasing methods of transistor and Explain transistor as an amplifier

(b) What is FET, explain.

Q.5. (a)What is MOSFET ? what are its Types & configuration, working principal, characteristics, and

region of operation

(b) What is feed back? Explain its type and derive its transfer function?

Q.6 (a) Explain:

(i) Wein Bridge Oscillator

(ii) Hartley Oscillator

(iii) Crystal Oscillator.

(b) Explain any two:

(i) Power amplifiers

(ii) Class B

(iii) Class A B

Q.7 (a) Explain reverse recovery time and Switching Characterstics for Diode.

(b) Explain Darlingtone Pair?

Q.8 (a) Explain Transients in RLC Circuits, initial conditions, time constants. Steady state analysis.

(b) Explain Nodal analysis method to find currents in various resistors in a Network.

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