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


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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DOI: http://dx.doi.org/10.21014/acta_imeko.v8i1.672