Assoc. Prof. Eng. Valentin GUTU, PhD
Rezumat
Lucrarea prezinta o analiza comparativa a zgomotului electronic propriu ale dispozitivelor de selectie a
semnalelor prin frecventa, analogice si numerice. Se trage concluzia ca filtrele numerice, asigurand un grad mai inalt de stabilitate contra perturbatiilor exterioare (campuri electrostatice si magnetice, interferente si bruiaj, etc.) poseda
un nivel considerabil de zgomot propriu; acesta depaseste considerabil nivelul zgomotului propriu al filtrelor
traditionale analogice active, de tip RC. Prin urmare filtrele numerice necesita un raport semnal/zgomot mult mai avansat.
Cuvinte cheie: analogdigitalfiltru activfrecventafunctie trece-joszgomot electronic propriu
Abstract
This paper prezents a comparative analy sis of selection devices signals by frequency, analog and digital,
in terms of their own electronic noise. Pull a conclsion that numerical filters, providing a higher degree of functional stability against disturbances (electrostatic and magnetic fields, lightning, interference and jamming, etc.) has a
considerable level of self noise, it exceeds (ten times) noise of filters its traditional analog active RC type. For a well functioning the digital filters requires a high signal/noise more advanced.
Keywords: active filteranalogdigitalfrequencylow - pass functionown electronic noise
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