An electronic amplifier is used for increasing the power of a signal.
It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In this sense, an amplifier may be considered as modulating the output of the power supply.
The term amplifier is applied to anything from a circuit (or stage) using a single active device to a complete system such as a packaged audio hi-fi amplifier.
Read more about Electronic Amplifier: Types of Amplifier, Classification of Amplifier Stages and Systems, Implementation
Famous quotes containing the word electronic:
“Sometimes, because of its immediacy, television produces a kind of electronic parable. Berlin, for instance, on the day the Wall was opened. Rostropovich was playing his cello by the Wall that no longer cast a shadow, and a million East Berliners were thronging to the West to shop with an allowance given them by West German banks! At that moment the whole world saw how materialism had lost its awesome historic power and become a shopping list.”
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