Definition of preamplifier in English:

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Pronunciation: /prēˈampləˌfīər/


An electronic device that amplifies a very weak signal, for example from a microphone or pickup, and transmits it to a main amplifier.
Example sentences
  • This makes it suitable for audio applications, including audio amplifiers and preamplifiers, home entertainment system, mixing desks and audio recording equipment.
  • The microphone signal was amplified by a low-noise preamplifier and was processed by a two-phase lock-in amplifier.
  • Microphone preamplifiers seem to come in two flavors these days: modern designs with lots of bells and whistles (such as EQ, dynamics and A / D converters) and vintage designs, which tend to take a more minimalist approach.



verb (preamplifies, preamplifying, preamplified)
Example sentences
  • The photodiode signal was preamplified, digitized, and processed by a computer.
  • The PA signal was preamplified and then analyzed by a lock-in amplifier.
  • All raw myoelectric signals were preamplified.
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