Ultralow-power analog front-end IC design for an implantable cardioverter defibrillator (ICD)

Weibo Hu, Yen Ting Liu, Tam Nguyen, Bosco Dsouza, Donald Y.C. Lie

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

This work proposes novel ultralow-power system and circuit designs and trade-offs on the analog front-end integrated circuit (IC) for an implantable cardioverter defibrillators (ICD). The major front-end analog IC includes pre-amplifier, filters, variable-gain-amplifier (VGA) and analog-to-digital converter (ADC). The pre-amplifier is designed with low-noise bipolar (BJT) transistors; filters are designed with both the switch-capacitor (SC) and the g m-C topology for comparison. The VGA includes a high-pass filter (HPF) and a DC shifter designed with a differential difference amplifier (DDA). A successive-approximation-register (SAR) ADC with a novel digital-to-analog converter (DAC) design is used to digitize signals and to reduce SAR ADC's input capacitance by half. The preliminary SPICE simulation of the entire front-end IC suggests it can effectively filter out undesired T-wave in patients' electrogram (EGM) to enable proper heartbeat detection.

Original languageEnglish
Title of host publicationProceedings - 2011 IEEE 9th International Conference on ASIC, ASICON 2011
Pages1018-1021
Number of pages4
DOIs
StatePublished - 2011
Event2011 IEEE 9th International Conference on ASIC, ASICON 2011 - Xiamen, China
Duration: Oct 25 2011Oct 28 2011

Publication series

NameProceedings of International Conference on ASIC
ISSN (Print)2162-7541
ISSN (Electronic)2162-755X

Conference

Conference2011 IEEE 9th International Conference on ASIC, ASICON 2011
CountryChina
CityXiamen
Period10/25/1110/28/11

Keywords

  • SAR ADC
  • g -C filter
  • implantable cardioverter defibrillators (ICD)
  • switch-capacitor filter
  • ultra-lowpower

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    Hu, W., Liu, Y. T., Nguyen, T., Dsouza, B., & Lie, D. Y. C. (2011). Ultralow-power analog front-end IC design for an implantable cardioverter defibrillator (ICD). In Proceedings - 2011 IEEE 9th International Conference on ASIC, ASICON 2011 (pp. 1018-1021). [6157380] (Proceedings of International Conference on ASIC). https://doi.org/10.1109/ASICON.2011.6157380