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Low-Noise Low-Pass Filter for ECG Portable Detection Systems with Digitally Programmable Range

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Abstract

This paper presents the design of an operational transconductance amplifier-C (OTA-C) low-pass filter for a portable Electrocardiogram (ECG) detection system. A fifth-order Butterworth filter using ladder topology is utilized to reduce the effect of component tolerance and to provide a maximally flat response. The proposed filter is based on a novel class AB digitally programmable fully differential OTA circuit. Based on this, PSPICE simulation results for the filter using 0.25-μm technology and operating under ±0.8 V voltage supply are also given. The filter provides a third harmonic distortion (HD3) of 53.5 dB for 100 mV p-p @50 Hz sinusoidal input, input referred noise spectral density of , total power consumption of 30 μW, and a bandwidth of 243 Hz. These results demonstrate the ability of the filter to be used for ECG signal filtering that is located within 150 Hz.

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Authors and Affiliations

  1. Electrical and Computer Engineering Department, Sharjah University, Sharjah, United Arab Emirates

    Soliman A. Mahmoud, Ahmed Bamakhramah & Saeed A. Al-Tunaiji

  2. Electrical Engineering Department, Fayoum University, Fayoum, Egypt

    Soliman A. Mahmoud

Authors
  1. Soliman A. Mahmoud
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  2. Ahmed Bamakhramah
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  3. Saeed A. Al-Tunaiji
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Correspondence to Soliman A. Mahmoud.

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Mahmoud, S.A., Bamakhramah, A. & Al-Tunaiji, S.A. Low-Noise Low-Pass Filter for ECG Portable Detection Systems with Digitally Programmable Range. Circuits Syst Signal Process 32, 2029–2045 (2013). https://doi.org/10.1007/s00034-013-9564-9

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  • DOI: https://doi.org/10.1007/s00034-013-9564-9

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