An 18.6-$\mu $W/Ch TDM-Based 8-Channel Noncontact ECG Recording IC With Common-Mode Interference Suppression
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- Title
- An 18.6-$\mu $W/Ch TDM-Based 8-Channel Noncontact ECG Recording IC With Common-Mode Interference Suppression
- Authors
- Choi, Kyu-Jin; Sim, Jae-Yoon
- Date Issued
- 2022-12
- Publisher
- Institute of Electrical and Electronics Engineers
- Abstract
- This paper presents an 8-channel electrocardiogram (ECG) monitoring integrated circuit (IC) controlled by time-division multiplexing (TDM). The proposed TDM compensates the electrode DC offsets by forming an individual discrete-time feedback loop per channel while sharing an analog frontend. This enables a chopping-free open-loop amplification, achieving a high input impedance suitable for a noncontact ECG monitoring. In addition, a common-mode interference (CMI) cancellation scheme is also introduced in the proposed TDM schedule for the realization of a pseudo-driven-right leg (DRL) in a multichannel environment. The designed system is implemented in 180 nm CMOS. The chip dissipates 18.6 μW/channel including the power consumption by ADC. It shows the total-CMRR of 100 dB against CMI voltage swing up to 20 VPP. The chip is verified in noncontact 8-channel ECG using conventional passive electrodes. IEEE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/115382
- DOI
- 10.1109/tbcas.2022.3229673
- ISSN
- 1932-4545
- Article Type
- Article
- Citation
- IEEE Transactions on Biomedical Circuits and Systems, vol. 16, no. 6, page. 1021 - 1029, 2022-12
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