Title：Biopotential recorder
Country：China
Patent No.：202011058817.6
Legal Status：Authorized
Inventor：Deng Luo, Milin Zhang, Zhihua Wang
Assignee：Tsinghua University
Address：Tsinghua University,Haidian District Beijing 100084, China
Filing Date：2020-09-30
Issue Date：2022-07-05
Abstract：
The invention discloses a biopotential recorder. The biopotential recorder comprises a chopper amplification module and a low-pass filtering module; the chopper amplification module comprises an offset elimination unit, a common mode elimination unit, a feedback unit, a direct current servo unit, an output amplification unit, an impedance lifting unit, a first modulation unit and a second modulation unit; the offset elimination unit is connected with the common mode elimination unit, the feedback unit, the direct current servo unit, the first modulation unit and the second modulation unit; theoutput amplification unit is connected with the feedback unit, the DC servo unit, the second modulation unit, the impedance lifting unit and the low-pass filtering module; and the first modulation unit is connected with the impedance lifting unit. Input noise is reduced through a first modulation unit of the chopper amplification module, electrode direct current offset is removed through the direct current servo unit, finally filtering is conducted through the low-pass filtering module, and the noise reduction capacity is high; the common mode elimination unit is used for reducing common-modeinterference; and while an input signal is amplified, the interference of the noise is reduced, and the performance is high.
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