Ultra low noise measurements often require the application of signal processing and correction techniques to go beyond the noise performances of front-end amplifiers. In this paper we propose a new method for the measurement of a voltage noise source that allows, at least in principle, the complete elimination of the noise introduced by the amplifiers used for the measurements. This is obtained by resorting to the conventional cross correlation technique for the elimination of the contribution of the EIVN of the amplifiers and by using a new three step measurement procedure that exploits different amplifier configuration measurements in order to subtract the contribution of the EICN of the amplifiers.
A novel ultra sensitive method for voltage noise measurements
CRUPI, Felice;PACE, Calogero
2005-01-01
Abstract
Ultra low noise measurements often require the application of signal processing and correction techniques to go beyond the noise performances of front-end amplifiers. In this paper we propose a new method for the measurement of a voltage noise source that allows, at least in principle, the complete elimination of the noise introduced by the amplifiers used for the measurements. This is obtained by resorting to the conventional cross correlation technique for the elimination of the contribution of the EIVN of the amplifiers and by using a new three step measurement procedure that exploits different amplifier configuration measurements in order to subtract the contribution of the EICN of the amplifiers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
