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Low Area Digital Front-End for Single Lead ECG Acquisition

Electrocardiogram(ECG) acquisition systems are most useful in the bio-medical field. Low area single-lead ECG acquisition system in 90 nm CMOS operating at 0.5 V is presented in this paper which is a wearable application that helps to continuously monitor heart rate of a patient. The ECG front-end converts a frequency domain signal into a time-domain signal to simplify analysis at lower technology nodes like 65nm, 45nm. The modified architecture of MAVTC is proposed in this paper is to amplify the input signal using low area. The control logic, Digital Current Converter (DCC), DCC switches, and counter are used in this architecture as a feedback loop to avoid the offset. The proposed architecture consumes 4SnW power with a gain of 673.5 μs/V which is better than the conventional architecture of MA-VTC.