13th IMEKO TC4 Symposium: The influence of sampling parameters on accuracy of capacitance measurement in the method based on DSP

摘要

The paper presents the method of measurement of impedance parameters based on measurement signals sampling and DSP. The influence of main sources of uncertainty and errors on capacitance measurement accuracy has been analysed. The following have been included: nonsynchronous sampling of two measurement signals proportional to current and voltage on impedance under measurement, A/D converter resolution and total number of collected samples. The results of simulations have been presented.