Implementation of the new source of the digitally synthesized sinusoidal voltage in INRIM two-terminal pair fully digital impedance bridge
Scientists from Italian Institute of Metrology (INRIM, Turin) and Silesian University of Technology (SUT, Gliwice, Poland) successfully implemented the high-stability digitally synthesized source in the two-terminal pair fully digital impedance bridge, developed at INRIM. The new source speeds up the process of the balancing the bridge. The DSP algorithm, implemented in the source minimizes the error, caused by limited resolution of the digital-to-analog converters reconstructing the sinusoidal signals. The low levels of close-to-fundamental harmonics of the synthesized voltage as well as high stability of the magnitude ratio and phase allows for precise comparisons of impedance standards. The source was developed by Marian Kampik (SUT) within an individual Research Exellence Grant, realized within European project „AIM QuTE: Automated Impedance Metrology extending the Quantum Toolbox for Electricity”, granted by European Metrology Research Programme (EMRP).
