B.Sc Electronics 6th Sem SOLID STATE ELECTRONICS CIRCUITS AND DIGITAL ELECTRONICS(Acharya Nagarjuna University (ANU), Guntur, Andhra Pradesh-2012)

B.Sc. DEGREE EXAMINATION, MAY 2012.
(Examination at the end of Final Year)
Electronics
Paper III — SOLID STATE ELECTRONICS CIRCUITS AND DIGITAL ELECTRONICS
Time : Three hours Maximum : 100 marks
Answer any FIVE questions.
All questions carry equal marks.
1. (a) Explain the working of a full wave rectifier.
(b) Explain the working of class-A power amplifier and derive expression for efficiency.
2. (a) Explain the working of shunt capacitor filter.
(b) Explain Class A, Class B, Class AB amlifier.
3. (a) Give the characteristics of an ideal op-amp.
(b) Explain CMRR, slew Rate of op-amp.
4. (a) Explain the concept of virtual ground.
(b) Explain summing amplifier and its working.
5. (a) Define modulation and need for modulation.
(b) Explain amplitude modulation in detail.
6. (a) Explain the advantages of FM over AM.
(b) Explain the working of Trade Detector.
7. (a) Give the properties of microwave.
(b) Explain the working of super heterodyne receiver with block diagram.
8. (a) Convert (78)2 to Hexedenal, (3 AF)16 to Binary.
(b) Explain OR, NOT, AND gates with truth tables.
9. (a) Explain RS flip-flop with necessary truth table.
(b) Explain JK flip-flop with necessary truth table.
10. Answer any TWO :
(a) D-flip flop
(b) Master-glove flip-flop
(c) TTL
(d) Positive and Negative logic