Lock-in amplifier with a high common-mode rejection ratio in the range of 0.02 to 100 kHz

Pavel Baranov; Valeriy Borikov; Veronica Ivanova; Bien Bui Duc; Sergey Uchaikin; Cheng Yang Liu

Journal ArticleOPEN ACCESS

Lock-in amplifier with a high common-mode rejection ratio in the range of 0.02 to 100 kHz

Acta IMEKO (2019) 8(1) 103-110

DOI: 10.21014/acta_imeko.v8i1.672

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Abstract

The paper presents a new lock-in amplifier with a differential input. The lock-in amplifier has a high common-mode rejection ratio of 200 dB at 1 kHz and 160 dB in the frequency range of 20 Hz to 100 kHz. A method for extending the dynamic range of comparing signals is suggested. The experimental results of metrological characteristic tests are discussed.

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Baranov, P., Borikov, V., Ivanova, V., Duc, B. B., Uchaikin, S., & Liu, C. Y. (2019). Lock-in amplifier with a high common-mode rejection ratio in the range of 0.02 to 100 kHz. Acta IMEKO, 8(1), 103–110. https://doi.org/10.21014/acta_imeko.v8i1.672

Lock-in amplifier with a high common-mode rejection ratio in the range of 0.02 to 100 kHz

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