preamplifier

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preamplifier

(pree-am -plă-fÿ-er) An amplifier used in a radio telescope to boost the signals from the antenna before they are fed to the receiver.

preamplifier

[prē′am·plə‚fī·ər]
(electronics)
An amplifier whose primary function is boosting the output of a low-level audio-frequency, radio-frequency, or microwave source to an intermediate level so that the signal may be further processed without appreciable degradation of the signal-to-noise ratio of the system. Also known as preliminary amplifier.

Preamplifier

A voltage amplifier suitable for operation with a low-level input signal. It is intended to be connected to another amplifier with a higher input level. Preamplifiers are necessary when an audio amplifier is to be used with low-output transducers such as magnetic phonograph pickups. A preamplifier may incorporate frequency-correcting networks to compensate for the frequency characteristics of a given input transducer and to make the frequency response of the preamplifier-amplifier combination uniform. See Amplifier, Voltage amplifier

preamplifier

(1) In the hi-fi stereo and home theater worlds, a preamplifier accepts signals from audio and video sources and feeds them to the amplifier and screen. For details, see preamp.

(2) An electronic device that boosts signals to a certain level, which may be further amplified. Preamplifiers are used in fields such as test and measurement, optical detection and audio engineering.
References in periodicals archive ?
The pre-amp outputs make it easy for integrators to tailor systems to best meet their customers needs.
The active booms come in several lengths and configurations with flexible gooseneck and XLR termination, while the new active cable only adds only a centimetre to the C pre-amp and capsule combination, making it even more discreet while giving the same unbeatable C amplifier performance.
This year it was the third annual TapeOpCon, held in New Orleans over Memorial Day weekend at the Fairmont Hotel and Orpheum Theater, although everyone ventured to the Howiin' Wolf in the evening to catch the likes of Calexico, the daylight hours could be spent entirely inside, taking part in workshops on studio construction and building your own mic pre-amp, or arguing the advantages of analog versus digital and the other way around.
For comprehensive gene expression studies, the isolated RNA can be transcribed into cDNA and subsequently pre-amplified with the new RealTime ready cDNA Pre-Amp Master.