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Multi-channel cross-correlation for increasing sensitivity in voltage noise measurements

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2 Author(s)
Scandurra, G. ; Dip. Fis. della Materia e Ing. Elettron., Univ. of Messina, Messina, Italy ; Ciofi, C.

In this paper we demonstrate that if N (N>;2) voltage amplifiers are connected to the device under test when performing voltage noise measurements in a situation in which the equivalent voltage noise of each single amplifier is larger than that to be measured, the time required for obtaining a given accuracy is reduced by a factor N(N-1)/2 with respect to the conventional set-up employing just two amplifiers. Measurements on two different set-ups employing up to 4 channels and up to 8 channels are presented that confirm that the expected reduction factors in measurement time by a factor of 6 and 28, respectively, are indeed obtained in actual experiments.

Published in:

Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International

Date of Conference:

13-16 May 2012