The lock-in amplifier: what is it for? how to build one?
A short description of the lock-in technique gives an idea of the working principle of these useful devices, that are spreadly used in weak signals detection, but rarely treated in introductory courses. Simple and cheap circuits, that may be easily assembled by the student are suggested, as a practi...
| Main Authors: | , |
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| Format: | Article |
| Language: | Portuguese |
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Sociedade Brasileira de Física
2022-04-01
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| Series: | Revista Brasileira de Ensino de Física |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172022000100433&tlng=en |
| Summary: | A short description of the lock-in technique gives an idea of the working principle of these useful devices, that are spreadly used in weak signals detection, but rarely treated in introductory courses. Simple and cheap circuits, that may be easily assembled by the student are suggested, as a practical approach to this powerful technique. |
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| ISSN: | 1806-9126 |