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Design of Tunable Low-Power Band-Stop Filter for Elimination of 50 Hz Power-Line Noise

Document Type : Research article

Authors

Department of Electrical Engineering, University of Guilan, Persian Gulf Highway, Rasht 41996-13776, Iran

Abstract

The electrocardiogram is affected by various noises and one of the most important of which is 50 Hz power-line noise. On the other hand, it is necessary to use a battery in the portable device and so it requires the use of low power consumption circuits. Therefore, one of the challenges ahead when designing this type of device is the use of energy-saving filters with the ability to integrate devices and attenuate unwanted signals properly. This paper presents a low-power tunable sixth-order band-stop filter that does not need the off-chip capacitors. The filter structure is based on operational transconductance amplifiers (OTA) and integrated capacitors. Also, it is possible to change the central attenuation frequency of the proposed filter using bias voltage of the transconductance amplifiers. The proposed band-stop filter is designed and simulated in 180 nm CMOS technology at the transistor level. The simulation results show that the proposed filter can attenuate unwanted signals at 50 Hz by 102 dB while the maximum capacitance used in the filter is 54 pF. The power consumption of the proposed band-stop filter is 13.1 nW at a supply voltage of 1.8 V.

Highlights

  • A low-power tunable sixth-order band-stop filter is designed to eliminate power-line noise for use in portable electrocardiograms.
  • The central attenuation frequency of the proposed filter can be changed using the bias voltage of the transconductance amplifiers to eliminate the power-line noise with a frequency of 50 or 60 Hz.
  • The filter structure is only based on operational transconductance amplifiers (OTA) and integrated capacitors.
  • The proposed filter is simulated in 180 nm CMOS technology at the transistor level and is implemented in schematic and layout form.
  • The power consumption of the proposed filter is 13.1 nW and the proposed filter does not need the off-chip capacitors.

Keywords

Main Subjects

References
[1]     S. L. Tripathi, K. B. Prakash, V. E. Balas, S. K. Mohapatra, and J. Nayak, Electronic devices, circuits, and systems for biomedical applications: Challenges and intelligent approach. San Diego, CA: Academic Press, 2021.
[2]     D. Bansal, Real-time data acquisition in human physiology: Real-time acquisition, processing, and interpretation-A MATLAB-based approach. San Diego, CA: Academic Press, 2021.
[3]     D. J. Hemanth, D. Gupta, and V. E. Balas, Intelligent Data Analysis for Biomedical Applications: Challenges and Solutions. San Diego, CA: Academic Press, 2019.
[4]     J. P. Vale Madeiro, P. C. Cortez, J. M. Da Silva Monteiro Filho, and A. R. Alencar Brayner, Developments and applications for ECG signal processing: Modeling, segmentation, and pattern recognition. San Diego, CA: Academic Press, 2018.
[5]     L. Tan, and J. Jiang, Digital Signal Processing: Fundamentals and Applications, 3rd ed. San Diego, CA: Academic Press, 2018.
[6]     H. Li, J. Zhang, and L. Wang, “A fully integrated continuous-time 50-Hz notch filter with center frequency tunability,” in 2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011, vol. 2011, pp. 3558–3562.
[7]     A. R. Verma, and Y. Singh, “Adaptive tuneable notch filter for ECG signal enhancement,” Procedia Computer Science, vol. 57, pp. 332–337, 2015.
[8]     E. V. Zaitsev, “Elimination on power line interference from ECG signal using combined bidirectional narrow-band notch filter,” Biophysics (Oxf.), vol. 60, no. 4, pp. 656–658, 2015.
[9]     S. K. Paul, C. K. Choubey, and G. Tiwari, “Low power analog comb filter for biomedical applications,” Analog Integrated Circuits Signal Process, vol. 97, no. 2, pp. 371–386, 2018.
 [10] M. De Matteis, F. Fary, E. A. Vallicelli, and A. Baschirotto, “A 28 nm CMOS 100 MHz 67 dB-dynamic-range 968 µW flipped-source-follower analog filter,” Journal of. low power electronics and applications, vol. 11, no. 2, pp. 15, 2021.
[11]  R. K. Ranjan, C. K. Choubey, B. C. Nagar, and S. K. Paul, “Comb filter for elimination of unwanted power line interference in biomedical signal,” Journal of Circuits, Systems and Computers, vol. 25, no. 06, pp. 1650052, 2016.
[12]  C. Yehoshuva, R. Rakhi, D. Anto, and S. Kaurati, “0.5 V, ultra low power multi standard Gm-C filter for biomedical applications,” in 2016 IEEE International Conference on Recent Trends in Electronics, Information & Communication Technology (RTEICT), 2016.
[13]  A. K. Luhach, D. Singh, P.-A. Hsiung, K. B. G. Hawari, P. Lingras, and P. K. Singh, Eds., in Advanced informatics for computing research: Second international conference, ICAICR 2018, Shimla, India, July 14-15, 2018.
[14]  S. A. Mahmoud, A. Bamakhramah, and S. A. Al-Tunaiji, “Six order cascaded power line notch filter for ECG detection systems with noise shaping,” Circuits Systems Signal Process., vol. 33, no. 8, pp. 2385–2400, 2014.
[15]  M. S. Diab and S. A. Mahmoud, “14.5nW; 30 dB analog front-end in 90-nm technology for biopotential signal detection,” in 2020 43rd International Conference on Telecommunications and Signal Processing (TSP), 2020, pp. 681-6840.
Journal of Applied Research in Electrical Engineering
Volume 1, Issue 2
Summer and Autumn 2022
July 2022
Pages 197-202
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History
  • Receive Date: 23 December 2021
  • Revise Date: 04 March 2022
  • Accept Date: 11 March 2022
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