Accurate Level-crossing ADC Design for Biomedical Acquisition Board

Mariam Tlili, Manel Ben-Romdhane, Asma Maalej, Mohamed Chaker Bali, François Rivet, Dominique Dallet, Chiheb Rebai

Abstract

The aim of this paper is to present a wireless biomedical system for the acquisition and transmission (Wibio’ACT) of biomedical signals. This work is a part of the Wibio’ACT project which main purpose is to ensure the minimum power consumption while diagnose patients continuously and in real time. For the Wibio’ACT system, the bottleneck is the analog-to-digital conversion (ADC) since it controls the power consumption of the digital signal processing step as well as the amount of the transmitted data. In fact, in this work case, the ADC continuously measures the electrical activity of the heart to deliver the electrocardiogram (ECG) signal. Hence, among conventional ADCs, level-crossing analog-to-digital converters (LC-ADCs) have been investigated for ECG signals processing. Authors propose some design consideration of the LC-ADC. This reduces the LC-ADC output samples by 13 % to help to save the power consumption of the wireless data transmitter. The samples with a small variation are reduced by at least 44%. The performance of the proposed design is measured in terms of percentage root mean square difference (PRD) applied to the reconstructed signal quality. A PRD of 1% is verified using behavioral simulations on ECG records extracted from different databases. A timer period TC of 0.14 ms ensures an effective number of bits of 10 bits and a signal to noise ratio of 62 dB.

References

  1. Ahmed, S. M., Al-Ajlouni, A. F., Abo-Zahhad, M., Harb, B., 2009. ECG signal compression using combined modified discrete cosine and discrete wavelet transforms, Journal of Medical Engineering and Technology.
  2. Allier, E., Sicard, G., Fesquet, L., Renaudin, M., 2003. A new class of asynchronous A/D converters based on time quantization, International Symposium on Asynchronous Circuits and Systems, IEEE.
  3. Cox, J. R., Nolle, F. M., Fozzard, H. A., Oliver, C. G., 1968. AZTEC, a preprocessing program for real time ECG rhythm analysis, IEEE Transactions on Biomedical Engineering.
  4. Giroud, F., Persechini, P., Ruedi, P.-F., Viemon, F., Masson, F., 2014. ECG sensor interface in a low power SoC for wireless portable ECG monitoring, Biomedical Circuits and Systems Conference, IEEE.
  5. Guan, K., Singer, A., 2007. Opportunistic sampling of bursty signals by level-crossing-An information theoretical approach, 41st Annual Conference on Information Sciences and Systems.
  6. Gyselinckx, B., Vullers, R.J.M., Van Hoof, C., Ryckaert, J., Yazicioglu, R.F., 2006. Human++: Emerging Technology for Body Area Networks, VLSI-SoC.
  7. Hartmann, E., 2003. ECG front-end design is simplified with microconverter, Analog Dialogue.
  8. Kozmin, K., Johansson, J., Delsing, J., 2009. Level crossing ADC performance evaluation toward ultrasound application, IEEE Transactions on. Circuits and Systems I: Regular Papers.
  9. Li, Y., Zhao, D., Serdijn, W. A., 2013. A sub-microwatt asynchronous level-crossing ADC for biomedical applications, IEEE Transactions on Biomedical Circuits and Systems.
  10. Long, Y., Harpe, P., Pamula, V.R., Osawa, M., Harada, Y., Tamiya, K., Van Hoof, C., Yazicioglu, R.F., 2014. A 680 nA ECG Acquisition IC for Leadless Pacemaker Applications, IEEE Transactions on Biomedical Circuits and Systems.
  11. Mark, J. W., Todd, T. D., 1981. A nonuniform sampling approach to data compression, IEEE Transactions on Communications.
  12. Mendis, S., Puska, P., Norrving, B., 2011. Global atlas on cardiovascular disease prevention and control, World Health Organization.
  13. Miaou, S.G., Chao, S.N., 2005. Wavelet-based lossy-tolossless ECG compression in a unified vector quantization framework, IEEE Transactions on Biomedical Engineering.
  14. Moody, G. B., Mark, R. G., Goldberger, A. L., 2001. PhysioNet: a web-based resource for the study of physiologic signals, IEEE Engineering in Medicine and Biology Magazine.
  15. Rajoub, B., 2002. An efficient coding algorithm for the compression of ECG signals using the wavelet transform, IEEE Transactions on Biomedical Engineering.
  16. Ravanshad, N., Rezaee-Dehsorkh, H., Lotfi, R., 2013. Detailed study of the time estimation in level-crossing analog-to-digital converters, Iranian Conference Electrical Engineering.
  17. Sayiner, N., Sorensen, H. V., Viswanathan, T. R., 1996. A level-crossing sampling scheme for A/D conversion, IEEE Transactions on Circuits and Systems II, Analog and Digital Signal Processing.
  18. Zigel, Y., Cohen, A., Katz, A., 2000. The weighted diagnostic distortion (WDD) measure for ECG signal compression, IEEE Transactions on Biomedical Engineering.
Download


Paper Citation


in Harvard Style

Tlili M., Ben-Romdhane M., Maalej A., Bali M., Rivet F., Dallet D. and Rebai C. (2016). Accurate Level-crossing ADC Design for Biomedical Acquisition Board . In Proceedings of the 9th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 4: Smart-BIODEV, (BIOSTEC 2016) ISBN 978-989-758-170-0, pages 321-326. DOI: 10.5220/0005855003210326


in Bibtex Style

@conference{smart-biodev16,
author={Mariam Tlili and Manel Ben-Romdhane and Asma Maalej and Mohamed Chaker Bali and François Rivet and Dominique Dallet and Chiheb Rebai},
title={Accurate Level-crossing ADC Design for Biomedical Acquisition Board},
booktitle={Proceedings of the 9th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 4: Smart-BIODEV, (BIOSTEC 2016)},
year={2016},
pages={321-326},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005855003210326},
isbn={978-989-758-170-0},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 9th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 4: Smart-BIODEV, (BIOSTEC 2016)
TI - Accurate Level-crossing ADC Design for Biomedical Acquisition Board
SN - 978-989-758-170-0
AU - Tlili M.
AU - Ben-Romdhane M.
AU - Maalej A.
AU - Bali M.
AU - Rivet F.
AU - Dallet D.
AU - Rebai C.
PY - 2016
SP - 321
EP - 326
DO - 10.5220/0005855003210326