preamplifier


Also found in: Dictionary, Wikipedia.

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 subject of procurement: The spectrum analyzer is portable R & S FSH (9 kHz - 8 GHz), with preamplifier
Thus a preamplifier circuit is required which amplifies the required signals and remove unwanted signals i.
Preamplifier parameters are essential for reception performance so it was investigated separately.
Both capsules can be used in a modular format and are entirely compatible with other d:dicate capsules and preamplifiers.
By offering a broad portfolio of SoC and preamplifier solutions, LSI enables its HDD customers to address all segments of the storage market, from mission-critical enterprise applications and high-capacity desktop PCs to low-power laptops and tape archive solutions.
The model comes in a preassembled kit, consisting of a high-precision condenser microphone and preamplifier, both constructed of stainless steel for high durability.
TELECOMWORLDWIRE-5 November 2007-LSI introduces PA2500 preamplifier integrated circuit(C)1994-2007 M2 COMMUNICATIONS LTD http://www.
Worldwide Computer Products News-5 November 2007-LSI introduces PA2500 preamplifier integrated circuit(C)1995-2007 M2 COMMUNICATIONS LTD http://www.
The preamplifier noise alone is 100 times smaller than counting statistics at the rates that will be encountered during the [A.
The receiver uses an extended range detector log video amplifier (DLVA), a preamplifier and RF bandpass filtering.
Abstract: The infrared radiation measurement system based on the cooled PbS photoconductive detector with a preamplifier and a mechanical chopper in the moisture meter with one beam is designed by the authors and analyzed in this paper.
It was hot on the heels of Ken Duke's review of the original AVA Omega III EC preamplifier (No.