Kalman filtering applied to the calibration of a high- resolution analog-to-digital converter

7th Brazilian Congress on Metrology

Ihlenfeld, Waldemar Guilherme Kürten^1 ; Kyriazis, Gregory A.^1 ; Landim, Regis P.^1

Instituto Nacional de Metrologia, Qualidade e Tecnologia-Inmetro, Brazil^1

关键词: Analog to digital converters;    DC voltage;    Full-scale ranges;    High resolution;    Josephson;    Kalman-filtering;    Optimal estimations;    Repeated measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/575/1/012013/pdf
DOI  :  10.1088/1742-6596/575/1/012013

来源: IOP

【 摘 要 】

The paper proposes the application of the Kalman filter in dc calibrations of analog-to- digital converters with a Zener or a Josephson dc voltage reference standard. Repeated measurements over the entire full-scale range of an analog-to-digital converter with posterior Kalman filtering allow optimal estimation of its deviations in respect to a dc reference to be obtained, yielding improved assessment of converter's linearity.