Enhanced analogue front-end for the measurement of the high state of wide-band voltage pulses with 87 dB common-mode rejection ratio and ±0.65 ppm 1-day offset stability

Pasquale Arpaia; Carlo Baccigalupi; Michele Martino

doi:10.1063/1.4930553

Enhanced analogue front-end for the measurement of the high state of wide-band voltage pulses with 87 dB common-mode rejection ratio and ±0.65 ppm 1-day offset stability

Rev Sci Instrum. 2015 Sep;86(9):095108. doi: 10.1063/1.4930553.

Authors

Pasquale Arpaia¹, Carlo Baccigalupi¹, Michele Martino¹

Affiliation

¹ Technology Department, CERN, Geneva 23, Switzerland.

PMID: 26429481
DOI: 10.1063/1.4930553

Abstract

An improved analogue front-end for measuring the high state of trapezoidal voltage pulses with transition duration of 3 μs is presented. A new measurement system, composed by a front-end and the state-of-the-art acquisition board NI PXI-5922, has been realized with improved Common Mode Rejection Ratio (CMRR) of more than 87 dB at DC and 3-sigma stability of ±0.65 ppm over 1 day. After highlighting the main design enhancements with respect to state-of-the-art solutions, the CMRR measurement is reported. The output drift due to temperature and humidity is assessed to be negligible. Finally, the worst-case repeatability is measured both with shorted-to-ground inputs and with an applied common-mode voltage of 10 V, which represents the nominal working condition.