Simultaneous Voltage and Current Measurement Instrumentation Amplifier for ECG and PPG Monitoring

An instrumentation amplifier (IA) capable of sensing both voltage and current at the same time has been introduced applied to electrocardiogram (ECG) photoplethysmogram (PPG) measurements for cardiovascular health monitoring applications. The proposed IA can switch between configurations in a time–division manner faster than ECG PPG bandwidths. application-specific integrated circuit (ASIC) design was implemented using 180 nm CMOS fabrication technology. Input-referred noise were measured as 3.9 µVrms 172 pArms, respectively, power consumption 34.9 µA. In configuration, reduction technique is applied, which confirmed be 25 times improvement over previous version. Using single IA, monitored form separated signals. addition, first time, merged ECG/PPG signal acquired, features peaks.