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- Q399804 subject Q8411406.
- Q399804 subject Q9665932.
- Q399804 abstract "A preamplifier (preamp) is an electronic amplifier that prepares a small electrical signal for further amplification or processing. A preamplifier is often placed close to the sensor to reduce the effects of noise and interference. It is used to boost the signal strength to drive the cable to the main instrument without significantly degrading the signal-to-noise ratio (SNR). The noise performance of a preamplifier is critical. According to Friis's formula, when the gain of the preamplifier is high, the SNR of the final signal is determined by the SNR of the input signal and the noise figure of the preamplifier.In a home audio system, the term 'preamplifier' may sometimes be used to describe equipment which merely switches between different line level sources and applies a volume control, so that no actual amplification may be involved. In an audio system, the second amplifier is typically a power amplifier (power amp). The preamplifier provides voltage gain (e.g., from 10 mV to 1 V) but no significant current gain. The power amplifier provides the higher current necessary to drive loudspeakers.Preamplifiers may be: incorporated into the housing or chassis of the amplifier they feed in a separate housing mounted within or near the signal source, such as a turntable, microphone or musical instrument.Three basic types of preamplifiers are available: current-sensitive preamplifier parasitic-capacitance preamplifier charge-sensitive preamplifier.".
- Q399804 thumbnail Musicfirstaudioclassicpreamplifier.jpg?width=300.
- Q399804 wikiPageExternalLink www.preamplifier.org.
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- Q399804 wikiPageWikiLink Q8411406.
- Q399804 wikiPageWikiLink Q854506.
- Q399804 wikiPageWikiLink Q899871.
- Q399804 wikiPageWikiLink Q9665932.
- Q399804 wikiPageWikiLink Q978470.
- Q399804 comment "A preamplifier (preamp) is an electronic amplifier that prepares a small electrical signal for further amplification or processing. A preamplifier is often placed close to the sensor to reduce the effects of noise and interference. It is used to boost the signal strength to drive the cable to the main instrument without significantly degrading the signal-to-noise ratio (SNR). The noise performance of a preamplifier is critical.".
- Q399804 label "Preamplifier".
- Q399804 depiction Musicfirstaudioclassicpreamplifier.jpg.