A 400GΩ Input-Impedance, 220MV pp Linear-Input-Range, 2.8Vpp CM-Interference-Tolerant Active Electrode for Non-Contact Capacitively Coupled ECG Acquisition

© 2018 IEEE. This paper presents a purely capacitively coupled active electrode (AE) for ECG acquisition for implementation in smart clothing or furniture. The AE has a DC input impedance of 400GΩ and 3.7μV rms (0.5-100Hz) input-referred noise. The whole design supports 220mV pp differential linear input range required in practical scenarios. An active driven-right-leg (DRL) loop is provided, achieving at least 70dB CMRR for up to 2.8V pp common-mode (CM) interference. Implemented in a 0.18μm CMOS process, the prototype occupies an area of 1.23mm 2 , and consumes 18μA and 13μA for the AE and DRL respectively. Through-clothing non-contact capacitively coupled ECG acquisition is demonstrated.

ISBN:9781538667002

Publication year:2018