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 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 ?
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.
Developed sensory system consists of microphone array with 15 omnidirectional condenser microphones with optimised geometry for frequency range of 1500 Hz to 2000 Hz and 16 channel preamplifier combined with anti-aliasing filter.
LSI Corporation (LSI) (NYSE: LSI), a provider of silicon, systems and software technologies, announced on Friday (2 November) the availability of the PA2500, its new high-performance, low-power preamplifier integrated circuit (IC) designed for use in 2.
The detectors are read out in current mode by vacuum photodiodes coupled via low noise current-to-voltage preamplifiers to transient digitizers sampling the diode signals every 10 [micro]s.
However, if your primary criteria for a preamplifier are inputs and features, then the EC will win that competition every time.
LAS VEGAS--NAD introduced two receivers--a surround and a stereo--and digital preamplifier at CES.
The electrode is connected to a 24-channel preamplifier, amplifier, monitor, high-speed digital and analog interfaces and finally a computer.
The design of the Prodigy TCI with its cooled 13C preamplifier enhances versatility compared to conventional TXI probes, and its RF power handling challenges that of RT probes.
Limited tenders are invited for Supply of digital lock in amplifier and voltage preamplifier
com/products/audiant/80i-integrated-amplifier) as well as the recently released Audiant DP32 USB DAC Preamplifier (https://store.
measurement microphones, including the popular model 46 high precision pressure and free field sets that combine a mic capsule and preamplifier in a calibrated, sealed unit.