A low-power bidirectional telemetry device with a near-field charging feature for a cardiac microstimulator

Shuenn-Yuh Lee, Chih Jen Cheng, Ming Chun Liang

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

In this paper, wireless telemetry using the near-field coupling technique with round-wire coils for an implanted cardiac microstimulator is presented. The proposed system possesses an external powering amplifier and an internal bidirectional microstimulator. The energy of the microstimulator is provided by a rectifier that can efficiently charge a rechargeable device. A fully integrated regulator and a charge pump circuit are included to generate a stable, low-voltage, and high-potential supply voltage, respectively. A miniature digital processor includes a phase-shift-keying (PSK) demodulator to decode the transmission data and a self-protective system controller to operate the entire system. To acquire the cardiac signal, a low-voltage and low-power monitoring analog front end (MAFE) performs immediate threshold detection and data conversion. In addition, the pacing circuit, which consists of a pulse generator (PG) and its digital-to-analog (D/A) controller, is responsible for stimulating heart tissue. The chip was fabricated by Taiwan Semiconductor Manufacturing Company (TSMC) with 0.35-μm complementary metaloxide semiconductor technology to perform the monitoring and pacing functions with inductively powered communication. Using a model with lead and heart tissue on measurement, a -5-V pulse at a stimulating frequency of 60 beats per minute (bpm) is delivered while only consuming 31.5 μ W of power.

Original languageEnglish
Article number5754619
Pages (from-to)357-367
Number of pages11
JournalIEEE Transactions on Biomedical Circuits and Systems
Volume5
Issue number4
DOIs
Publication statusPublished - 2011 Aug 1

Fingerprint

Telemetering
Electric potential
Charge pump circuits
Tissue
Semiconductor materials
Controllers
Pulse generators
Demodulators
Monitoring
Phase shift keying
Data communication systems
Lead
Wire
Networks (circuits)
Communication
Industry

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Electrical and Electronic Engineering

Cite this

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abstract = "In this paper, wireless telemetry using the near-field coupling technique with round-wire coils for an implanted cardiac microstimulator is presented. The proposed system possesses an external powering amplifier and an internal bidirectional microstimulator. The energy of the microstimulator is provided by a rectifier that can efficiently charge a rechargeable device. A fully integrated regulator and a charge pump circuit are included to generate a stable, low-voltage, and high-potential supply voltage, respectively. A miniature digital processor includes a phase-shift-keying (PSK) demodulator to decode the transmission data and a self-protective system controller to operate the entire system. To acquire the cardiac signal, a low-voltage and low-power monitoring analog front end (MAFE) performs immediate threshold detection and data conversion. In addition, the pacing circuit, which consists of a pulse generator (PG) and its digital-to-analog (D/A) controller, is responsible for stimulating heart tissue. The chip was fabricated by Taiwan Semiconductor Manufacturing Company (TSMC) with 0.35-μm complementary metaloxide semiconductor technology to perform the monitoring and pacing functions with inductively powered communication. Using a model with lead and heart tissue on measurement, a -5-V pulse at a stimulating frequency of 60 beats per minute (bpm) is delivered while only consuming 31.5 μ W of power.",
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A low-power bidirectional telemetry device with a near-field charging feature for a cardiac microstimulator. / Lee, Shuenn-Yuh; Cheng, Chih Jen; Liang, Ming Chun.

In: IEEE Transactions on Biomedical Circuits and Systems, Vol. 5, No. 4, 5754619, 01.08.2011, p. 357-367.

Research output: Contribution to journalArticle

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