Ultra Low-Power Biomedical Signal Processing

An Analog Wavelet Filter Approach for Pacemakers

  • Authors
  • Sandro A. P. Haddad
  • Wouter A. Serdijn

Part of the Analog Circuits and Signal Processing book series (ACSP)

Table of contents

  1. Front Matter
    Pages i-x
  2. Sandro A. P. Haddad, Wouter A. Serdijn
    Pages 1-12
  3. Sandro A. P. Haddad, Wouter A. Serdijn
    Pages 13-31
  4. Sandro A. P. Haddad, Wouter A. Serdijn
    Pages 33-50
  5. Sandro A. P. Haddad, Wouter A. Serdijn
    Pages 51-74
  6. Sandro A. P. Haddad, Wouter A. Serdijn
    Pages 75-94
  7. Sandro A. P. Haddad, Wouter A. Serdijn
    Pages 95-130
  8. Sandro A. P. Haddad, Wouter A. Serdijn
    Pages 131-172
  9. Sandro A. P. Haddad, Wouter A. Serdijn
    Pages 173-177
  10. Back Matter
    Pages 179-215

About this book


Ultra Low-Power Biomedical Signal Processing describes signal processing methodologies and analog integrated circuit techniques for low-power biomedical systems. Physiological signals, such as the electrocardiogram (ECG), the electrocorticogram (ECoG), the electroencephalogram (EEG) and the electromyogram (EMG) are mostly non-stationary. The main difficulty in dealing with biomedical signal processing is that the information of interest is often a combination of features that are well localized temporally (e.g., spikes) and others that are more diffuse (e.g., small oscillations). This requires the use of analysis methods sufficiently versatile to handle events that can be at opposite extremes in terms of their time-frequency localization.

Wavelet Transform (WT) has been extensively used in biomedical signal processing, mainly due to the versatility of the wavelet tools. The WT has been shown to be a very efficient tool for local analysis of non-stationary and fast transient signals due to its good estimation of time and frequency (scale) localizations. Being a multi-scale analysis technique, it offers the possibility of selective noise filtering and reliable parameter estimation.

Often WT systems employ the discrete wavelet transform, implemented on a digital signal processor. However, in ultra low-power applications such as biomedical implantable devices, it is not suitable to implement the WT by means of digital circuitry due to the relatively high power consumption associated with the required A/D converter. Low-power analog realization of the wavelet transform enables its application in vivo, e.g. in pacemakers, where the wavelet transform provides a means to extremely reliable cardiac signal detection.

In Ultra Low-Power Biomedical Signal Processing we present a novel method for implementing signal processing based on WT in an analog way. The methodology presented focuses on the development of ultra low-power analog integrated circuits that implement the required signal processing, taking into account the limitations imposed by an implantable device.


Biomedical Signal Processing Biomedical application analog signal processing biomedical biomedical applications electronics integrated circuits low power signal processing wavelets (WT)

Bibliographic information