Linear integrated Circuits Premium Lecture Notes, Prepared by Lavanya. Specially for Electronics and Communication Engineering. Syllabus Covered based on Anna University B.E Electronics and Communication Engineering

CONTENT:

UNIT-1 (Pg.no 1-50)

BASICS OF OPERATIONAL AMPLIFIERS

UNIT-2 (Pg.no 51-110)

APPLICATION OF OPERATIONAL AMPLIFIER

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UNIT-1

BASICS OF OPERATIONAL AMPLIFIERS

Introduction

Block diagram of operational amplifier

Current sources

1. Ideal current sources

2. Basic current sources

Current mirror

Basic current sources circuit

Wilder current sources

Wilson current sources

Current sources as active load

Differential amplifier with active load

Limitation in IC fabrication

BJT differential amplifier using active loads

Voltage sources

Voltage references

Properties

Band gap voltage references

Important op-amp parameters

1. Power supply rejection ratio

2. Slew rate

Effects of slew rate

Slew rate equation

Methods of improving slew rate

Open loop configuration of op-amp

Closed loop configuration of op-amp

Advantages

IC741 Operational amplifier

Internal circuit diagram of IC741

Features of op-amp

Package of op-amp

Commercial op amp parameters

Characteristics of op amp

Advantages

Applications

Block diagram of op-amp

Ideal operational amplifier

Differential gain

Common mode gain

Common mode rejection ratio CMRR

Features of differential amplifier

Ideal op amp characteristics

Ideal voltage transfer curve

DC characteristics of op amp

1. Input bias current

2. Input offset current

3. Input offset voltage

4. Thermal drift

AC characteristics of op amp

1. Slew rate

2. Frequency response

Effect of slew rate

Slew rate equation

Frequency response of op-amp

Observation from frequency response of op amp

Voltage series feedback amplifier

Closed loop voltage gain

Input resistance with feed back

Output resistance with feedback

Total output offset voltage with feedback

Voltage shunt feedback amplifier

Closed loop voltage gain

Application of operational amplifier

1. Summer and subtractor

2. Differentiator

3. Integrator

Non-inverting summing amplifier

Subtractor or differential amplifier

Integrator

Active op amp integrator

Input and output waveform

Differentiator

UNIT-2

APPLICATION OF OPERATIONAL AMPLIFIER

Introduction

Zero input current

Assumption for analyze practical op-amp

Closed loop gain

Voltage follower

Summer or adder circuit

Inverting summer

Non-inverting summing amplifier

Average circuit

Subtractor or difference amplifier

Voltage to current converter

Voltage to current converter with grounded load

Application of V-I converters

Low voltage AC voltmeter

Diode tester and match filter

Zener diode tester

Current to voltage converter

Application of I/V converter

1. Photo diode detector

2. Photo FET detector

Instrumentation amplifier

Requirements of a good instrumentation amplifier

1. Finite ,accurate and stable gain

2. Easier gain adjustment

3. High input impedance

4. Low output impedance

5. High CMRR

6. Low power consumption

7. Low thermal and time drift

8. High slew rate

Difference amplifier using one op amp

Limitation

Modified difference amplifier

Instrumentation amplifier with two op-amp

Advantages

Three op-amp instrumentation amplifier

Application

Integrator

Frequency response of ideal amplifier

Limitation

Basic logarithmic amplifier

Temperature compensated log amplifier

Antilog amplifier

Compensators

Types

1. Non-inverting compensator

2. Inverting compensator

Basic non-inverting compensator

Schmitt trigger

Inverting Schmitt trigger

Precision rectifier

Precision half wave rectifier

1. positive HWR

2. Negative HWR

Active peak detector

Types

1. Voltage follower peak detector

2. Peak detector using integrator

Clippers

Types

1. Positive clipping circuit

2. Negative clipping circuit

Clampers

Types

1. Positive clamper circuits

2. Negative clamper circuits

Active filters

Types

1. Passive filters

2. Active filters

Advantages

Low pass butterworth filters

High pass butterworth filters

Band pass filters

Wide band pass filters

Narrow band pass filters

Band elimination filter

Types

1. Wide band reject filter

2. Narrow band reject filter

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