Construção e análise de circuito pré-amplificador de alta fidelidade sonora

Abstract

This paper presents an in-depth study about how the architecture, layout and quality of electronic components influence the process of amplifying an audio signal, clarifying the premises necessary to characterize high-fidelity sound equipment. It provides topics of relevance for a good understanding of the physical phenomena involved in the preamplification process such as characteristics of sound waves, audio and noise signals, basic characteristics of electronic components and technical specifications of audio equipment. It also brings the step-by-step construction of a high-fidelity preamplifier, components and circuit layout, a spectral analysis of each component highlighting the importance of these for the whole process, in addition to results of electrical and auditory tests elaborated in laboratories and environments acoustically translated.