preamplifier

(redirected from Pre amplifier)
Also found in: Dictionary.

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 world, a preamplifier accepts signals from audio sources (CDs, turntables, etc.) and boosts the current to the level required for amplification. 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 ?
Tenders are invited for 16 channel charge sensitive pre-amplifier with differential outputs: specification for 16 channel pre amplifier and accessories: 16 channel pre amplifier a) 16 channel compact module b) esd input protection c) input connector: subd25 female connector d) 'differential' output (for twisted pair 34 pin male header connector); output amplitude: 0 to +/-1 v e) a switch to scale amplificaton by 5 times f) pulser input: i internally distributed to individual charge termination capacities.
Limited Tenders are invited for Request For Supply Of Pre Amplifier Pha 4000-1 Each-01.
Tenders are invited for supply of pre amplifier card of turbine flow meter at wrpl,mundra.