Andhra University BSc Electronics Syllabus

ELECTRONICS - Paper III - Solid State Electronics Circuits & Digital Electronics

I. Power Amplifier : Expression for power, Harmonic distortion and efficiency. Pushpull amplifiers : Class A, Class B and Class AB disadvantages.

II. Operational Amplifiers : Basic (Emitter coupled) difference amplifier and its parameter, operational amplifier : characteristics of an ideal OP Amp. Block diagram of an IC Op. Amp. feed-back arrangement open loop gain, common mode voltage gain, common mode rejection ratio (CMRR), Band width rate, Offset voltage and bias currents. Op. Amp. Analysis : Concept of virtual ground. Analysis of inverting amplifier, summing amplifier current and voltage followers. Application : Op. Amp. as comparater, voltage regulator. free running multivibrator and to solve a simple second order differential equation.

III. Modulation and Detection (Qualitative) : Need for modulation. Amplitude modulation and detection : Analysis of amplitude modulated wave, side bands. Simple amplitude modulator -circuit and its working. Detection of AM wave (diode detector). Frequency modulation and detection : Advantages of frequency modulation, analysis of frequency modulated wave. Side bands (frequency components). Working of a simple frequency modulator. Detection of FM waves. Electro -magnetic spectrum : Identification of areas where (Infra Red, Radio waves and Micro waves are applied). Radio Broadcasting and Reception : Explanation of working of Super Hetrodyne Receiver (Block diagram) concept of micro waves - their properties and applications in Communications, Medical, Scientific and domest

IV Rectifiers and power supplies : (a) Rectifier : Halt wave, Full wave and Bridge rectifiers and their efficiency. Ripple factor, Regulation, Harmonic components in rectifier output. (b) Types of filters: Choke input filter (Inductor) shunt capacitor filter, L Section and 11 Section filters.
(c) Regulated power supplies : Shunt and series regulated power sup

V. Digital Electronics :
(a) Number system : Binary number system, converting Binary to Decimal and vice-versa -Binary addition and substraction (1 s and 2s compliment methods) Hexa decimal number system. Converting Binary to Hexa-decimal and vice-versa - converting Hexa decimal to decimal and viceversa Binary coded decimal (BCD) (8421) and gray code, conversion between Binary and gray code. The ASCII Code (American Standard Code for Information Interchange). Logic Gates : OR, AND, NOT Gates : Truth tables, realisation of these gates using diodes, resistors and Transistor circuits. Positive and Negative logic. Laws of Boolean algebra, Universal building blocks NAND and NOR gates. Transistor - Transistor Logic (TTL) and Complementary Metal Oxide Semiconductor (CMOS) logic. (c) Combination logic circuits : Half, full and parallel adders. Sequentional logic circuits Flip -Flips (RS,TD JK and Master slave JK) - their working and tables. Counters and shift registers. Binary and CIO Code converters.

Textbooks recommended:
1. Integrated Electronics by Multiman and Halkias.
2. Electronic Communications by Kennedy.
3. Principles of Digital Electronics by Malvino & Leach.
4. Basic Electronics and Linear Circuits by Bhargava et al.

Books for supplementary reading
1. A Text Lab Manual in Electronics by ZDAR (Tata McGraw Hill).
2. Electronics Fundamental by J.K. Ryder.
3. Digital Electronics by William H. Gothman.
4. Operational Amplifiers by S.V. Subramanyam.
5. Op. Amp. and Linear Integrated Circuits by Ramakanth Gayakwad.
6. Electronic Circuits and Devices by Samuel Seeleey.

Practicals :
(Duration : 3 hours) Any ten experiments

1. D.C. Power Supply & Filter
2. Anostable Multi-vibrator using Transistor
3. Monostable multi-vibrator using Transistor
4. Bistable Multi-vibrator using Transistor
5. Schernit Trigger using Transistor
6. Emitter Follower using Transistor
7. Emitter coupled difference amplifier using Transistor
8. Digital experiments :
(i) Verifying truth tables of OR, AND, NOT, NAND, NOR and Ex-OR gates (7400).
(ii) Construction of basic gates (OR, AND and NOT) using discrete elements (Diodes, resisters and Transistors).
(iii) Verifying De Morgons theorems.
(iv) Constructing other gates using NAND and NOR gates.
(v) Construction of Half and full adders and verifying their truth tables.
(vi) Testing and verifying Flip flops (RS, D and JK).
(vii) Testing and verifying counters (Binary 7493) BCD (7490) Division Module N(l to 9).
(viii) Shift Register using JKFF.
9. Experiments using Op. Amps. : Op. Amp. characteristics - off set Null voltage, biased currents, CMRR & slow rate OP Amp. 741 as
(a) D.C. inverting amplifier
(b) Non-inverting amp. (AC and DC)
(c) Summer
(d) Integrator
(e) Differentiator
(f) Weigh Bridge Oscillator, Astable Multivibrator.
10. Voltage Regulator using IC 7805 (Vi characteristics).
11. Construction of Astable Mufti-vibrator using IC 555 (Multi-vibrator).