An ultra low-power ECG amplifier for wearable devices using classical 2-stage OTA

Abstract Wearabl smart devices have become an important method to monitor people’s health. This research work aims offer a relatively optimum solution amplify the biomedical signal in case of wearable devices. is done by using single-stage amplifier and Operational Transimpedance Amplifier (OTA) stage. The OTA stage uses typical 2-stage topology, with first-stage differential pair, second common source provide high-gain. Simulation results showed that has gain 40.04dB, total integrated input-referred noise 3.59uVrms, power consumption 1.44uW, NEF 21 CMRR 82 dB. In conclusion, verify topology useful satisfy low-power requirement.