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Noise reduction in AC-coupled amplifiers

Autor
Serrano, R.; Pallas-Areny, R.
Tipus d'activitat
Article en revista
Revista
IEEE transactions on instrumentation and measurement
Data de publicació
2014-07-01
Volum
63
Número
7
Pàgina inicial
1834
Pàgina final
1841
DOI
https://doi.org/10.1109/TIM.2014.2299525 Obrir en finestra nova
Projecte finançador
INSTRUMENTACION NO INVASIVA PARA MONITORIZAR Y EVALUAR TENDENCIAS EN EL SISTEMA CARDIOVASCULAR
Repositori
http://hdl.handle.net/2117/26329 Obrir en finestra nova
URL
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6728674 Obrir en finestra nova
Resum
AC-coupled amplifiers are noisier than dc-coupled amplifiers because of the thermal noise of the resistor(s) in the ac-coupling network and the increased contribution of the amplifier input noise current i(n). Both contributions, however, diminish if the corner frequency f(c) of the high-pass filter observed by the signal is lowered, the cost being a longer transient response. At the same time, the presence of large resistors in the ac-coupling network suggests that the use of FET-input amplifie...
Citació
Serrano, R.; Pallas, R. Noise reduction in AC-coupled amplifiers. "IEEE transactions on instrumentation and measurement", 01 Juliol 2014, vol. 63, núm. 7, p. 1834-1841.
Paraules clau
Ac-coupling Networks, Capacitance Output Sensors, Fast Fourier Transform Noise Measurement, High-pass Filters, Noise Reduction, Op-amp Noise, Resistive Sensors, Voltage Amplifiers
Grup de recerca
GRUP ISI - Grup d'Instrumentació, Sensors i Interfícies

Participants