With the technique, the CMRR of an electrical impedance tomography (EIT) data acquisition system would be 118dB,when the differential gain of the system is 1000 and the measurement frequency is 50kHz.

• 应用这种技术,阻抗成象数据采集系统在差分增益为1000时,对50kHz的同频共模干扰的共模抑制比CMRR为118dB。