Implementation of a high-frequency digital lock-in amplifier

Implementation of a high-frequency digital lock-in amplifier

A high-frequency digital lock-in amplifier that uses non-uniform sampling is proposed and validated experimentally. By using a random sampling strategy, it is possible to process periodic signals of frequencies several times greater than the Nyquist frequency, which is given by the sampling theorem....

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Sonnaillon, M.O., Urteaga, R., Bonetto, F.J., Ordonez, M.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Amplifiers
Digital signal processing
Digital signal processors
Frequency conversion
Instruments
Phase locked loops
Sampling methods
Signal generators
Signal processing
Signal sampling
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Beschreibung
Zusammenfassung:A high-frequency digital lock-in amplifier that uses non-uniform sampling is proposed and validated experimentally. By using a random sampling strategy, it is possible to process periodic signals of frequencies several times greater than the Nyquist frequency, which is given by the sampling theorem. The implemented instrument, based on a digital signal processor and its associated hardware, is described in this paper. Experimental results show the advantages of the proposed lock-in
ISSN:0840-7789
2576-7046
DOI:10.1109/CCECE.2005.1557199