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Introduction to the Operational Amplifier

Introduction to the Operational Amplifier. μ A 741 OP AMP. Schematic -- 741 OP AMP. 741 OP AMP – Package & Pin Layout. 2 Inverting Input 3 Non-Inverting Input 6 Output 7 + Voltage Supply V CC 4 – Voltage Supply V EE 1 and 5 -- Offset Null. Circuit Symbol for the OP AMP.

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Introduction to the Operational Amplifier

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  1. Introduction to the Operational Amplifier μA 741 OP AMP ECE 201 Circuit Theory I

  2. Schematic -- 741 OP AMP ECE 201 Circuit Theory I

  3. 741 OP AMP – Package & Pin Layout • 2 Inverting Input • 3 Non-Inverting Input • 6 Output • 7 + Voltage Supply VCC • 4 – Voltage Supply VEE • 1 and 5 -- Offset Null ECE 201 Circuit Theory I

  4. Circuit Symbol for the OP AMP Simplify to 3 terminals ECE 201 Circuit Theory I

  5. μA 741 OP AMP – Pin Identification • 2 Inverting Input • 3 Non-Inverting Input • 6 Output • 7 + Voltage Supply VCC • 4 – Voltage Supply VEE • 1 and 5 -- Offset Null For simplicity, use only pins 2, 3, and 6. ECE 201 Circuit Theory I

  6. Terminal Voltages ECE 201 Circuit Theory I

  7. Terminal Currents ECE 201 Circuit Theory I

  8. Voltage Transfer Characteristic ECE 201 Circuit Theory I

  9. ECE 201 Circuit Theory I

  10. Ideal OP AMP (Open Loop) A = “open-loop” gain A ECE 201 Circuit Theory I

  11. Connect Rf -- “Negative Feedback” ECE 201 Circuit Theory I

  12. Inverting Amplifier ECE 201 Circuit Theory I

  13. Analysis Using the Ideal OP AMP “Virtual” ground ECE 201 Circuit Theory I

  14. Analysis continued ECE 201 Circuit Theory I

  15. Non-Inverting Amplifier ECE 201 Circuit Theory I

  16. Analysis Using the Ideal OP AMP “Virtual Short ECE 201 Circuit Theory I

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