An open-source high-frequency lock-in amplifier

被引：38
|
作者：
Stimpson, G. A. [1 ,2 ]
Skilbeck, M. S. [1 ]
Patel, R. L. [1 ,2 ]
Green, B. L. [1 ]
Morley, G. W. [1 ,2 ]
机构：
[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
[2] Univ Warwick, Diamond Sci & Technol Ctr Doctoral Training, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2019年 / 90卷 / 09期
基金：
英国工程与自然科学研究理事会;
关键词：
CHANNEL;
D O I：
10.1063/1.5083797
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
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/root 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.
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页数：10
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