EC 2205-ELECTRONIC CIRCUITS I-ANNA UNIVERSITY SYLLABUS ECE

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**C 2205 ELECTRONIC CIRCUITS I L T P C**

**3 1 0 4**

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The aim of this course is to familiarize the student with the analysis and design of basic
transistor
Amplifier circuits and power
supplies.

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· On completion of this course the student will
understand

· The methods of biasing transistors

· Design of simple amplifier circuits

· Midband analysis of amplifier circuits using small - signal equivalent circuits to
determine gain input impedance and output impedance

· Method of calculating cutoff frequencies and to determine bandwidth

· Design of power amplifiers

· Analysis and design of power
supplies.

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**T I TRANSISTOR BIAS STABILITY 12**

BJT – Need for biasing – Stability factor - Fixed bias circuit, Load line and quiescent

point. Variation of quiescent
point due to

*h**F**E*variation within manufacturers tolerance -
Stability factors - Different types of biasing circuits - Method of stabilizing the Q point - Advantage of Self bias (voltage divider bias) over
other types of biasing, Bias compensation – Diode, Thermister and Sensistor compensations, Biasing the FET and MOSFET.

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**T II MIDBAND ANALYSIS OF SMALL SIGNAL AMPLIFIERS 12**

CE, CB and CC amplifiers - Method of drawing small-signal equivalent circuit - Midband
analysis of various types
of single stage amplifiers to obtain gain, input impedance and output impedance - Miller’s theorem - Comparison of CB, CE and CC amplifiers and their
uses - Methods of increasing input impedance using Darlington connection and
bootstrapping - CS, CG and CD (FET) amplifiers - Multistage amplifiers.

Basic emitter coupled differential amplifier circuit
- Bisection theorem. Differential gain –
CMRR - Use of constant current circuit to improve CMRR - Derivation of transfer characteristic.

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**T III FREQUENCY RESPONSE OF AMPLIFIERS 12**

General shape of frequency response of amplifiers - Definition of cutoff
frequencies and bandwidth - Low
frequency analysis of amplifiers to obtain lower cutoff frequency Hybrid

– p equivalent circuit of BJTs - High frequency analysis of BJT amplifiers to obtain

upper cutoff frequency – Gain Bandwidth Product - High frequency equivalent circuit of
FETs
- High frequency analysis of FET amplifiers - Gain-bandwidth product of FETs -
General
expression for frequency response of multistage amplifiers -
Calculation of overall upper and lower cutoff frequencies of multistage amplifiers - Amplifier rise time and sag and their relation to cutoff frequencies.

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**T IV LARGE SIGNAL AMPLIFIERS 12**

Classification of amplifiers, Class A large signal
amplifiers, second harmonic distortion, higher order harmonic distortion, transformer-coupled class A audio power amplifier –
efficiency of Class A amplifiers. Class B amplifier
– efficiency - push-pull
amplifier
- distortion in amplifiers - complementary-symmetry (Class B)
push-pull amplifier, Class C,
Class D amplifier – Class
S amplifier – MOSFET power amplifier, Thermal stability and
heat sink.

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**T V RECTIFIERS AND POWER SUPPLIES 12**

Classification of power supplies, Rectifiers - Half-wave, full-wave and bridge rectifiers

with resistive load. Analysis for

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*c*

and ripple voltage with C, L, LC and CLC filters.

Voltage multipliers, Voltage regulators - Zener diode regulator, principles of obtaining a
regulated power supply, regulator
with current limiting, Over voltage protection, Switched
mode power supply (SMPS), Power
control using SCR.

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**TORIAL = 15 TOTAL : 60 PERIODS TEXT BOOKS**

1. Millman J and Halkias .C., Integrated Electronics, TMH, 2007.

2.
S. Salivahanan, N. Suresh Kumar
and A. Vallavaraj, Electronic Devices and Circuits,

2nd Edition, TMH, 2007.

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**FERENCES**

1. Robert L. Boylestad and Louis Nashelsky, Electronic Devices and Circuit Theory, 9th

Edition, Pearson Education / PHI, 2007.

2. David A. Bell, Electronic Devices & Circuits, 4th Ediion, PHI, 2007

3. Floyd, Electronic Devices, Sixth Edition, Pearson Education, 2002.

4. I.J. Nagrath, Electronic Devices and Circuits, PHI, 2007.

5. Anwar A. Khan and Kanchan K. Dey, A First Course on Electronics, PHI, 2006.

6. B.P. Singh and Rekha Singh, Electronic Devices and Integrated Circuits, Pearson

Education, 2006.

7. Rashid M, Microelectronics Circuits, Thomson Learning, 2007.

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