3.8 mW electrocardiogram (ECG) filtered electrical impedance tomography IC using I/Q homodyne architecture for breast cancer diagnosis

A low-power electrical impedance tomography (EIT) IC proposed for breast cancer diagnosis is implemented in 180nm CMOS process. For the breast cancer diagnosis, low power and high accuracy is required. The proposed IC reduces the power consumption to 3.8mW using the homodyne conversion mixer to lower the sampling rate of ADC. To gain high accuracy, the adaptive filter using the miller capacitor perfectly filters out the ECG signal. I/Q dual path architecture measures conductivity and permittivity components separately, so distance errors are reduced about 86% in simulation.