Low-frequency digital lock-in amplifier
Abstract
A digital lock-in amplifier which simultaneously measures in phase and in quadrature components at a reference frequency and at twice this frequency is described. It is drift free, insensitive to harmonics, has a very high gain stability (25 ppm/K), and operates up to 1250 Hz with no limitations on the low-frequency side.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- March 1985
- DOI:
- 10.1063/1.1138324
- Bibcode:
- 1985RScI...56..466P