preamplifikaatioon
Preamplification is the initial stage of signal processing, particularly in audio and electronics. Its primary purpose is to increase the amplitude of a weak electrical signal to a level suitable for subsequent processing or amplification. This is crucial because many signal sources, such as microphones, turntables, or sensors, produce very low-level outputs that are susceptible to noise if amplified directly by a main amplifier. A preamplifier, or preamp, acts as an intermediary, boosting the signal's strength while ideally introducing minimal unwanted noise or distortion.
In audio systems, preamplifiers are essential for handling signals from sources like microphones and phono cartridges.
Beyond audio, preamplification is vital in scientific instrumentation and data acquisition. Sensors used in various fields,