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An open-source high-frequency lock-in amplifier

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Stimpson, Guy, Skilbeck, Mark, Patel, R. L., Green, Ben L. and Morley, Gavin (2019) An open-source high-frequency lock-in amplifier. Review of Scientific Instruments, 90 (9). 094701. doi:10.1063/1.5083797

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Official URL: http://dx.doi.org/10.1063/1.5083797

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Abstract

We present characterization of a lock-in amplifier based on a field programmable gate array capable of demodulation at up to 50 MHz. The system exhibits 90 nV/√Hz of input noise at an optimum demodulation frequency of 500 kHz. The passband has a full-width half-maximum of 2.6 kHz for modulation frequencies above 100 kHz. Our code is open source and operates on a commercially available platform

Item Type: Journal Article
Subjects: Q Science > QA Mathematics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Lock-in amplifiers, Open source software, Field programmable gate arrays, Demodulation (Electronics)
Journal or Publication Title: Review of Scientific Instruments
Publisher: American Institute of Physics
ISSN: 0034-6748
Official Date: 10 September 2019
Dates:
DateEvent
10 September 2019Published
19 August 2019Accepted
Volume: 90
Number: 9
Article Number: 094701
DOI: 10.1063/1.5083797
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDBruker BioSpinhttp://dx.doi.org/10.13039/100009018
EP/L015315/1 [EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
UNSPECIFIEDRoyal Societyhttp://dx.doi.org/10.13039/501100000288
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