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  1. Introduction to the Amplifier - Basic Electronics Tutorials and …

  2. Amplifier - Wikipedia

  3. Operational Amplifier Basics - Op-amp tutorial

  4. Understanding Amplifiers Definition, Types, Uses, and Applications

  5. Types of Amplifiers : Circuits, Working & Their Applications

  6. Amplifier in electronics

  7. Amplifier with its Circuit, construction, Working and Applications

  8. How Amplifiers Work - HowStuffWorks

  9. Amplifiers in Electronics, Amplifier types, simulations, and circuits

  10. How does an amplifier work? - Explain that Stuff