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Everything about Amplifier

Electronic device/component that increases the strength of a signal

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a signal. It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude of a signal applied to its input terminals, producing a proportionally greater amplitude signal at its output. The amount of amplification provided by an amplifier is measured by its gain: the ratio of output voltage, current, or power to input. An amplifier is defined as a circuit that has a power gain greater than one. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: AmplifierA 5-minute orientation
  2. Skim a recent paper: A photonic integrated circuit–based erbium-doped amplifierInfluential work since 2022
  3. Pick up a classic book: Introductory Electronic Devices and CircuitsThe most-reprinted book on the subject
  4. Read the landmark paper: A low-power low-noise cmos for amplifier neural recording applicationsCited 1,506 times
  5. Go sideways: Valve amplifierA closely related topic
  6. Go sideways: Valve RF amplifierA closely related topic

📖 Definitions

Noun Anything that amplifies, or makes something larger or more intense.

Noun An adverb that adds intensity, such as "really" or "totally".

Noun An appliance or circuit that increases the strength of a weak electrical signal without changing the other characteristics of the signal.

Noun A portable encasement that houses a large speaker, used to amplify voices and musical instruments at live performances.

🗂️ The subject at a glance

  1. History
  2. Theory of operation
  3. Properties
  4. Negative feedback
  5. Categories
  6. Applications
  7. Classification of amplifier stages and systems
  8. Example amplifier circuit
  9. Notes on implementation
  10. Special types

🏆 Landmark papers (most cited)

🆕 Influential since 2022

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

🔗 Related topics