dc.contributor
Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica
dc.contributor
Universitat Politècnica de Catalunya. GRUP ISI - Grup d'Instrumentació, Sensors i Interfícies
dc.contributor.author
Serrano Finetti, Roberto Ernesto
dc.contributor.author
Casas Piedrafita, Óscar
dc.contributor.author
Pallàs-Areny, Ramon
dc.date.issued
2019-07-01
dc.identifier
Serrano, R.; Casas, J.O.; Pallàs-Areny, R. Common mode electronic noise in differential circuits. "Measurement", 1 Juliol 2019, vol. 140, p. 207-214.
dc.identifier
https://hdl.handle.net/2117/174258
dc.identifier
10.1016/j.measurement.2019.04.028
dc.description.abstract
Differential circuits are assumed to reject common-mode noise yet no parameter is available to describethat rejection as the Common Mode Rejection Ratio (CMRR) applies only to deterministic signals, not torandom noise. We propose a model and a method to analyze the contribution of the input common-modeelectronic noise to the output voltage noise of differential circuits. The analysis shows that the sameparameter-matching conditions that improve the CMRR determine common-mode noise rejection butCMRR is more sensitive to mismatching. For example, a low-frequency CMRR as low as 8 dB implies thatmore than 82% of common-mode noise is rejected. Thus, often only differential-mode noise is relevant.However, if the equivalent input current noise sources predominate over equivalent input voltage noisesources, cross-correlation between them partially yields common-mode noise that will also be rejected.We also propose a simple test that yields an estimate of that correlation.
dc.description.abstract
Peer Reviewed
dc.description.abstract
Postprint (published version)
dc.format
application/pdf
dc.relation
https://www.sciencedirect.com/science/article/pii/S0263224119303306
dc.rights
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights
Attribution-NonCommercial-NoDerivs 3.0 Spain
dc.subject
Àrees temàtiques de la UPC::Enginyeria electrònica
dc.subject
Amplifiers (Electronics)
dc.subject
Operational amplifiers
dc.subject
Electronic noise
dc.subject
Differential circuits
dc.subject
Instrumentation amplifiers
dc.subject
Electronic noise
dc.subject
Cross-correlation
dc.subject
Common-mode rejection ratio
dc.subject
Soroll Electronic
dc.subject
Amplificadors (Electrònica)
dc.title
Common mode electronic noise in differential circuits
