Open AccessDetermination of noise figure of differential circuits using correlation of output noise waves
Author(s) -
Andee Y.,
Prouvée J.,
Graux F.,
Danneville F.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2014.0212
Subject(s) - noise (video) , noise generator , effective input noise temperature , noise temperature , differential (mechanical device) , electronic circuit , noise figure , noise spectral density , noise measurement , noise floor , noise power , electronic engineering , acoustics , physics , mathematics , power (physics) , electrical engineering , phase noise , computer science , noise reduction , engineering , amplifier , cmos , artificial intelligence , image (mathematics) , thermodynamics , quantum mechanics
The noise characterisation of differential circuits is considered. A new method for the determination of the differential mode noise power at the output of these circuits is presented. It is demonstrated that this differential noise power depends not only on the output noise powers but also on the correlation of the output noise waves. An analytical expression of this correlation in terms of the S ‐parameters and the output noise powers is determined. Based on the presented theory, a fast and simple technique is developed for the noise figure measurement of differential circuits.