UNIVERSITÀ
DEGLI
STUDI
DEL SANNIO
DEL SANNIO
Benevento
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ING-INF/07 - Misure Elettriche ed Elettroniche
Keywords
Electrical and electronic measurement
compressive sampling
data acquisition systems
measurement systems for biomedical applications
signal processing
Research topics
Principal research areas:
- New circuit architectures for low-power data acquisition systems (DAQ);
- Hardware design for front-end/back-end DAQ;
- Jitter measurement and its standardization;
- Design of embedded systems;
- Distributed measurement systems including wireless sensor networks (WSNs);
- Digital signal processors (DSPs) systems;
- Hardware Security for Internet-of-Things (IoT) systems.
Measurement of a sinewave phase with very high accuracy:
- this is a research collaboration with NIST, which aims in developing an instrument able to do phase measurements upon large frequency range, ranging from mHz to tens of GHz.
- this research is funded by NIST by two grants, summing of approximately $1M
Reference:
Ioan Tudosa, Francesco Picariello, Pasquale Daponte, Luca De Vito, Sergio Rapuano, Nicholas G. Paulter,
"Prototype of high accuracy single input phase measurement instrument", Measurement, Volume 201,
2022, 111595, ISSN 0263-2241, https://doi.org/10.1016/j.measurement.2022.111595.
(https://www.sciencedirect.com/science/article/pii/S0263224122008089)
Abstract
A prototype implementation of a phase measurement method (PMM) for a sine-wave signal delivered at the output port of a generator and its experimental assessment is presented. This PMM is capable of measuring the output phase of a sine-wave signal respect to a reference phase with high accuracy and a very low uncertainty. A description of the prototype PMM, and its mathematical model are given in the paper. The prototype operates over the frequency range of 100 Hz to 10 MHz and it is composed from three main subsystems: (i) the sampling circuit, (ii) the pulse-train signal generator, and (iii) the data acquisition and digital signal processing. A laboratory test bench was realized to assess the phase measurement repeatability of the prototype, and a maximum phase standard deviation of 0.021 degree measured at 25 ºC was obtained for the output frequency of 10 MHz, where the phase uncertainty decreases with decreasing frequency.