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*abbreviated ‘pre-amp’*
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-as of [29 APRIL 2024]–
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*BRANDS* —>
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-a [pre-amplifier] is an [electronic amplifier] that prepares a small electrical signal for further [‘amplification’ / ‘processing’]-
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(they are typically used to amplify signals from ‘microphones’, ‘instrument pickups’, and ‘phonographs’ to ‘line level’)
(‘preamplifiers’ are often integrated into the audio inputs on ‘mixing consoles’, ‘DJ mixers’, and ‘sound cards’)
(they can also be stand-alone devices)
(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’)
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(3 basic types of pre-amplifiers are available…)
‘current-sensitive preamplifier’
‘parasitic-capacitance preamplifier’
‘charge-sensitive preamplifier’
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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👈👈👈☜*-RECORDING EQUIPMENT-* ☞ 👉👉👉
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥