ECT 301, Introduction to OPAMPS

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ECT 301, Linear Integrated Circuits

• CEC

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Contents

• Syllabus.
• Ideal OPAMP.
• OPAMP Parameters.
• IC 741.
• Power Supply Connections.
• Reference Books.

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Course Outcomes
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Evaluation
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Module 1

• Operational Amplifiers Block Diagram, Ideal and
  Practical OPAMPS, OPAMP Configurations,
  Characteristics.
• Differential Amplifiers Analysis, Parameters,
  Current Mirror.

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Module II

• OPAMP with negative feedback Virtual Ground,
  Inverting and Non-Inverting Configurations,
  Parameters.
• OPAMP Applications Voltage follower, Arithmetic
  Operations, Instrumentation Amplifiers,
  Comparators, Schmitt Triggers,
• Log and Anti-Log Amplifiers.

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Module III

• Oscillators and Multivibrators, Waveform
  Generators.
• Active Filters Types, State Variable Filters.

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Module IV

• Timer and VCO IC 555 Functional Block Diagram,
  Astable and Monostable Multivibrators, LM 566.
• Phase Locked Loop Analysis, LM 565.

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Module V

• Voltage Regulators Fixed and Adjustable
  Regulators, IC 723.
• A/D and D/A Converters Types, Specifications.

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OPAMP Introduction

• Two input terminals, one output terminal, two
  power supply terminals.
• Amplifies input difference.

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OPAMP Introduction
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Ideal OPAMP
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Ideal OPAMP

• Infinite Input Impedance draws no current at
  the input terminals.
• Infinite Gain - Small differential input voltages
  amplified.
• Output Voltage independent of current drawn from
  the output - can drive infinite number of
  devices.
• Zero Output Impedance for impedance matching.
• Not practical to realize.

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IC Packages

• Metal Can Package (TO).
• Dual in-line package.
• Flat package or flat pack.
• May contain one, two or four OPAMPS.

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IC Packages
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IC Packages
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Power Supply Connections
Common Ground
5 V to 22 V
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Power Supply Connections
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Open Loop Configuration

• No feedback from output to input.
• May saturate.
• Limited Number of Applications Zero Crossing
  Detector, Comparator etc.

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Closed Loop Configuration

• Negative feedback.
• OPAMP utility increased.
• Inverting and non-inverting configuration.
• Not likely to saturate.
• As amplifiers, oscillators etc.

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Inverting Amplifier
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Non-inverting Amplifier
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Linear IC Manufacturers
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IC 741 Versions
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IC 741 Pin Configuration

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Ideal OPAMP vs IC 741
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IC 741 Maximum Ratings

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References
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References
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Thank You