Title :
Enhanced sensitivity cross-correlation method for voltage noise measurements
Author :
Crupi, Felice ; Giusi, Gino ; Ciofi, Carmine ; Pace, Calogero
Author_Institution :
Dipt. di Elettronica Informatica e Sistemistica, Univ. of Calabria, Arcavacata Di Rende
Abstract :
Ultralow 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, a new method for the voltage noise measurement is proposed, which 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 equivalent input voltage noise 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 equivalent input current noise of the amplifiers
Keywords :
circuit noise; circuit testing; correlation methods; electric noise measurement; interference suppression; low noise amplifiers; sensitivity analysis; voltage measurement; amplifier noise; correction techniques; cross-correlation technique; equivalent input voltage noise; front-end amplifiers; input current noise; noise elimination; sensitivity cross-correlation; signal processing; spectral analysis; ultralow noise measurements; voltage noise measurements; Background noise; Current measurement; Impedance; Low-frequency noise; Low-noise amplifiers; Noise measurement; Performance evaluation; Signal processing; Spectral analysis; Voltage measurement; Amplifier noise; cross correlation; low-frequency noise; noise measurement; spectral analysis;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2006.876392
