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preamplifier

[pree-am-pluh-fahy-er] /priˈæm pləˌfaɪ ər/
noun
1.
a device in the amplifier circuit of a radio or phonograph that increases the strength of a weak signal for detection and further amplification.
Origin
1930-1935
1930-35; pre- + amplifier
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for preamplifier
  • Each detector employed its own preamplifier, but only a single electronics channel was used for signal processing thereafter.
British Dictionary definitions for preamplifier

preamplifier

/priːˈæmplɪˌfaɪə/
noun
1.
an electronic amplifier used to improve the signal-to-noise ratio of an electronic device. It boosts a low-level signal to an intermediate level before it is transmitted to the main amplifier Sometimes shortened to preamp
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for preamplifier
n.

1929, from pre- + amplifier. Shortened form pre-amp is attested from 1957.

Online Etymology Dictionary, © 2010 Douglas Harper
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