Bioimpedance measurement circuit, bioimpedance measurement method and wearable device

The invention discloses a bioimpedance measuring circuit, which comprises a processor, a differential amplifier, a first resistor, a second resistor, a first SPDT analog switch, a second SPDT analog switch, a first electrode, a second electrode, a third electrode and a fourth electrode. The invention also provides a bioimpedance measuring method and a wearable device. The invention calculates theimpedance of the tester by measuring the voltage of the two ends of the first resistor on the same line and the voltage of the two ends after the second resistor and the tester are connected in parallel. Since the resistance values of the first resistor and the second resistor are known, the impedance of the tester can be calculated conveniently. 本发明公开种生物阻抗测量电路，包括：处理器、差分放大器、第电阻、第二电阻、第单刀双掷模拟开关、第二单刀双掷模拟开关、第电极、第二电极、第三电极、第四电极。本发明还提供种生物阻抗测量方法和种可穿戴设备。本发明通过测量同条线路上的第电阻两端的电压、第二电阻与测试人员并联后两端的电压，由于第电阻和第二电阻的阻值已知，便可以计算出测试人员的阻抗，十分方便。