Electrochemical measurement system having interference reduction circuit
    100.
    发明授权
    Electrochemical measurement system having interference reduction circuit 失效
    具有干扰减少电路的电化学测量系统

    公开(公告)号:US5220920A

    公开(公告)日:1993-06-22

    申请号:US790669

    申请日:1991-11-08

    Applicant: James Gharib

    Inventor: James Gharib

    CPC classification number: G01N33/48785 A61M5/1723

    Abstract: A system for electrically measuring certain chemical characteristics of electrically-conductive fluids, such as blood, located within a tube and subject to electrical current interference. The measurements are made by measuring the voltage potential between a reference electrode and a sensor electrode sensitive to a particular blood parameter such as pH or calcium, potassium or chloride concentration. A bypass path for the electrical current interference is provided by a pair of noise-reduction electrodes located on opposite sides of the reference and sensor electrodes and interconnected by an amplifier having a relatively low output impedance and a relatively high input impedance. The electrical current interference bypasses the signal electrodes by flowing directly into the amplifier's output terminal, such that the reference and sensor electrodes develop a potential between them that is independent of the electrical current interference.

    Abstract translation: 用于电测量位于管内并受到电流干扰的诸如血液的导电流体的某些化学特性的系统。 通过测量对特定血液参数敏感的参考电极和传感器电极之间的电压电位(例如pH或钙,钾或氯化物浓度)进行测量。 用于电流干扰的旁路路径由位于参考电极和传感器电极的相对侧上的一对降噪电极提供,并由具有相对低的输出阻抗和相对高的输入阻抗的放大器互连。 电流干扰通过直接流入放大器的输出端而绕过信号电极,使得参考电极和传感器电极在它们之间形成独立于电流干扰的电位。

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