REFERENCE’S ACCURACY IN VIRTUAL FREQUENCY-TO-CODE CONVERTERS

S. Y. Yurish, N. V. Kirianaki, N. O. Shpak

Abstract

The methodology and experimental results of the researches for thermal instability of reference clock generator in microcontroller based frequency-to-code converters with virtual channel are described in the Paper. The temperature uncertainty of the frequency and time references, distribution laws and correlation factor of their errors were determined in the experiments. The maximum relative temperature error of the frequency reference is ± 11.5 &middot 10^-6, and the maximum temperature error of the time reference is ± 0.38 &middot 10^-6. The total relative error of the “measurement standard” in the microcontroller based frequency-tocode converters is equal to ± 10.9 &middot 10^-6. The obtained results are used at research of the limiting metrological characteristics for microcontroller based measuring instruments of frequency/time parameters with virtual measuring channel.

Keywords

frequency-to-code converter, quartz-crystal generator, temperature instability

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IMEKO-WC-2000-EWADC-P650.pdf

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