Název:	Measurement of low AC currents by the standard current probe equipped with lock-in amplifier
Autoři:	Švarný, Jiří
Citace zdrojového dokumentu:	ŠVARNÝ, J. Measurement of low AC currents by the standard current probe equipped with lock-in amplifier. In Proceedings of the 2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) : CDEE 2022. Pilsen: University of West Bohemia in Pilsen, 2022. s. nestránkováno. ISBN: 978-1-66548-082-6
Datum vydání:	2022
Nakladatel:	University of West Bohemia in Pilsen
Typ dokumentu:	konferenční příspěvek ConferenceObject
URI:	2-s2.0-85141363698 http://hdl.handle.net/11025/50537
ISBN:	978-1-66548-082-6
Klíčová slova v dalším jazyce:	current probe;lock-in amplifier;dynamic range;current measurement;noise suppression
Abstrakt v dalším jazyce:	Most of standard current probes are intended for the measurement of medium or higher currents. Usually, due to limited dynamic range, characteristic sensitivity and inner noise of the probe, it is hardly possible to measure currents lower than 100 mA. The paper deals with the possibility to extend the dynamic range of the current probe by an additional external lock-in amplifier. The paper describes the principle of the lock-in amplifier in general and design of the laboratory fixture of lock-in amplifier based on AD630 circuit as well. The designed amplifier was used to condition the output of the Agilentll46A current probe. The experiment is described in detail. The results show that thanks to the lockin amplifier the currents even lower than 1 mA can be easily detected.
Práva:	© IEEE
Vyskytuje se v kolekcích:	OBD

Všechny záznamy v DSpace jsou chráněny autorskými právy, všechna práva vyhrazena.