JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-requisites

Nil.

Course Objective

The main objective of the course is:

• To familiarize the student with the analysis and design of basic transistor amplifier circuits and their frequency response characteristics, feedback amplifiers, oscillators, large signal amplifiers and tuned amplifiers

Course Outcomes

Upon completion of the subject, students will be able to:

• Design and analyse the DC bias circuitry of BJT and FET
• Analyse the different types of amplifiers, operation and its characteristics
• Design circuits like amplifiers, oscillators using the transistors diodes and oscillators

UNIT - I

Single Stage Amplifiers: Classification of Amplifiers – Distortion in Amplifiers, Analysis of CE, CC, and CB Configurations with simplified Hybrid Model, Analysis of CE amplifier with Emitter Resistance and Emitter follower, Miller’s Theorem and its dual, Design of Single Stage RC Coupled Amplifier using BJT. Multi Stage Amplifiers: Analysis of Cascaded RC Coupled BJT amplifiers, Cascode Amplifier, Darlington Pair, Different Coupling Schemes used in Amplifiers - RC Coupled Amplifier, Transformer Coupled Amplifier, Direct Coupled Amplifier.

UNIT - II

BJT Amplifiers - Frequency Response: Logarithms, Decibels, General frequency considerations, Frequency response of BJT Amplifier, Analysis at Low and High frequencies, Effect of coupling and bypass Capacitors, The Hybrid- pi () - Common Emitter Transistor Model, CE Short Circuit Current Gain, Current Gain with Resistive Load, Single Stage CE Transistor Amplifier Response, Gain-Bandwidth Product, Emitter follower at higher frequencies. MOSFET Amplifiers [3]: Basic concepts, FET Amplifiers, MOS Small signal model, Common source amplifier with Resistive load.

UNIT - III

Feedback Amplifiers: Concepts of Feedback, Classification of Feedback Amplifiers, General characteristics of Negative Feedback Amplifiers, Effect of Feedback on Amplifier Characteristics, Voltage Series, Voltage Shunt, Current Series and Current Shunt Feedback Configurations, Illustrative Problems. Oscillators: Classification of Oscillators, Conditions for Oscillations, RC Phase Shift Oscillator, Generalized analysis of LC oscillators - Hartley, and Colpitts Oscillators, Wien- Bridge & Crystal Oscillators, Stability of Oscillators.

UNIT - IV

Large Signal Amplifiers: Classification, Class A Large Signal Amplifiers, Transformer Coupled Class A Audio Power Amplifier, Efficiency of Class A Amplifier, Class B Amplifier, Efficiency of Class B Amplifier, Class-B Push-Pull Amplifier, Complementary Symmetry Class B Push-Pull Amplifier, Distortion in Power Amplifiers, Thermal Stability and Heat Sinks.

UNIT - V

Tuned Amplifiers: Introduction, Q-Factor, Small Signal Tuned Amplifiers, Effect of Cascading Single Tuned Amplifiers on Bandwidth, Effect of Cascading Double Tuned Amplifiers on Bandwidth, Stagger Tuned Amplifiers, Stability of Tuned Amplifiers.

TEXT BOOKS:

• 1. Integrated Electronics - Jacob Millman and Christos C Halkias, 1991 Ed., 2008, TMH.
• 2. Electronic Devices and Circuits, B. P. Singh, Rekha Singh, Pearson, 2013.

REFERENCE BOOKS:

• 1. Electronic Circuit Analysis – Rashid, Cengage Learning, 2013
• 2. Design of Analog CMOS Integrated Circuits – Behzad Razavi, 2008, TMH.
• 3. Electronic Devices and Circuit Theory - Robert L. Boylestad, Louis Nashelsky, 9 Ed., 2008 PE.
• 4. Microelectronic Circuits – Sedra and Smith – 5 Ed., 2009, Oxford University Press.
• 5. Electronic Devices and Circuits - S. Salivahanan, N. Suresh Kumar, A. Vallavaraj, 2 Ed., 2009, TMH.