Download Analog Electronics

EC111 Analog Electronics L-T-P: 3-1-0; Total 42 Lectures
Prerequisites: i) EC-101 (Elements of Electronics Engg. Course)
Objective: The objective of this course is to provide students with a working knowledge of all
varieties of Analog Circuits IC Chips: their design, applications and their Frequency Response.
Course Outcome: Upon successful completion of this course, students should be able to:
Analyze frequency response of BJT and MOS amplifiers
Understand use current mirrors and widlar current sources as the building Block of differential
amplifiers,
Understand and apply concept of feedback to improve stability of circuits.
Understand all variety of analog IC Chips namely op-Amp, voltage controlled oscillator, phase locked
loop and switched capacitor filters.
Topics Covered
Unit-I: BJT-Small signal operation and module, (3.6) collector current and the trans-conductance,
Base current and the input resistance at the base, Emitter current & i/p resistance at the emitter,
-model, Application of small
signal equivalent circuits, performing small signal analysis directly on the circuit diagram, Account of
Early effect, BJT internal capacitances & high frequency hybrid-off frequency,
Unit-II: MOSFET-The basic MOSFET CS, CG amplifiers, small signal- The comm. Drain or source
Amplifier, Operations models of MOSFET (4.6), The MOSFET internal capacitances (4.8) & High
frequency models, The body effect and the role of substrate, modelling of body effect (4.11), temp.
effect, break-down as input-protection. MOSFET unity-gain frequency (fT).
Unit-III: IC Amplifiers-High frequency response- High frequency gain function, determining the 3- dB
frequency fH, methods and Miller’s thereom.
Some useful transistor pairing:- CD-CS, CC-CE and CD-CE configurations, the Darlington
configurations, CC-CB & CD-CG configurations.
The wide band amplifier configurations:- obtaining wideband amplification by source & emitter
degeneration, CD-CS, CC-CE, & CD-C configaration, CC-CB and CD-CG configuration.
Current Mirror circuits with improved performance, cascade MOS mirrors, A bipolar mirror with
base current compensation, Wilson current mirror, Wilson MOS mirror, Widlar current source.
Unit-IV: Feedback Amplifier- Feedback configurations (topologies), Effect of feedback on mplifier
poles, stability study using Bode-plot, frequency compensation.
Unit-V: Multistage & Differential
1. MOS Differential pair- operation with a common-mode i/p voltage, operation with a differential
input voltage, large signal operation.
2. Small-signal operation of the MOS differential pair- differential gain, differential half circuit,
differential Amplifier with Cs loads, cascode differential amplifier, common mode gain and common
mode rejection ratio.
3. BJT differential pair :- Basic operation, input common mode range, large signal operation, small
signal operation.
4. Other non-ideal characteristics differential amplifier :- input offset voltage of MOS differential
pair, input offset voltage of Bipolar differential pair, input bias and offset currents of bipolar pair,
input common mode range.
5. Differential Amplifier with active load :- differential-to-single ended conversion active-loaded MOS
: differential pair, differential gain of active loaded MOS pair, common mode gain & CMRR, Bipolar
differential pair with active load.
6. Frequency response of the differential amplifier :- Analysis of resistively loaded MOS amplifier,
analysis of active-loaded MOS amplifier.
7. Multistage amplifiers: - A two-stage CMOS op-Amp, a bipolar op-Amp.
Unit-VI: Output stages and Power AmplifiersClassification of output stages,
Class A output stage :- transfer characteristics, signal waveforms, power dissipation, power
conversion efficiency, transformer coupled power amplifier, class B transformer coupled amplifier.
Class B output stage :- Circuit operation, transfer characteristics, power-conversion efficiency,
power dissipation, reducing cross over distortion, single supply operation.
Class AB output stage :- Circuit operation, output resistance.
Class C output stage :- Efficiency of class C amplifier.
Text Books:
1. Sedra & Smith-Microelectronic Circuits- Oxford University Press
2. Franco-Design with Operational Amplifiers & Analog Integrated Circuits , 3th edition, McGraw Hill
3. Op-amps and Linear IC’s, R.A. Gayakwad, PHI
4. J. R. C. Jaegar and T. N. Blalock, Microelectronic Circuit Design, Tata McGraw Hill,2006
Reference Books:
1. Millman & Halkias - Integrated Electronics, McGraw Hill, 2006.
2. Rashid- Microelectronic Circuits-Analysis and Design- Thomson (Cenage Learning)
3. Schilling & Belove - Electronic Circuit: Discrete & Integrated , 3th edition , McGraw Hill
4. Razavi- Fundamentals of Microelectronics- Wiley
5. Tobey & Grame - Operational Amplifier: Design and Applications, McGrawHill.