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An Ultra-Low Power Fixed-Window Level Crossing ADC for ECG Recording | IEEE Journals & Magazine | IEEE Xplore

An Ultra-Low Power Fixed-Window Level Crossing ADC for ECG Recording


Abstract:

In this paper, a novel fixed-window level-crossing analog-to-digital converter (LCADC) is proposed for the ECG monitoring application. The proposed circuit is implemented...Show More

Abstract:

In this paper, a novel fixed-window level-crossing analog-to-digital converter (LCADC) is proposed for the ECG monitoring application. The proposed circuit is implemented using fewer comparators and reference levels compared to the conventional structure, which results in a decrease in complexity and occupied silicon area. Also, the power consumption is reduced considerably by decreasing the activity of the comparator. Simulation results show a 5-fold reduction in activity by applying the standard ECG signals to the proposed structure. The proposed circuit is implemented in 0.18 µm CMOS technology using a 0.9 V supply voltage. Measurement results show a 5.9 nW power consumption and a 7.4-bit resolution. The circuit occupies a 0.05846 mm2 silicon area. A typical level-crossing-based R-peak-detection algorithm is applied to the output samples of the LCADC, which shows the effectiveness of using this type of sampling.
Published in: IEEE Transactions on Biomedical Circuits and Systems ( Volume: 18, Issue: 5, October 2024)
Page(s): 1089 - 1099
Date of Publication: 12 March 2024

ISSN Information:

PubMed ID: 38470594

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