Multichannel current-mode stimulator with channel-specific regulated power supply

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Developing neuroprosthetic bioelectronic devices requires wirelessly-powered implantable stimulator systems with hundreds to thousands of output channels. Power efficiency optimization is crucial for scaling up the number of output channels. Current-mode electrical stimulation is favored for safety but is power-inefficient in conventional designs, particularly in multichannel stimulators. An adaptive voltage supply can improve power efficiency, but implementing channel-specific voltage supplies in large-scale systems is challenging. Conventional power management suffers from losses and low efficiency due to multiple conversion stages. This work proposes a multichannel current-mode stimulator with a parallel, adaptive ac/dc power management strategy using single-stage phase-controlled converters to prevent cascaded losses. This allows for generating channel-specific supply voltages within a small area for high power efficiency and high-density electrical stimulation. The proposed circuit was designed and simulated using TSMC 180 nm technology and demonstrates an improvement in the power efficiency of up to 45% with respect to a conventional power-management strategy using a fixed supply voltage.
Original languageEnglish
Title of host publicationProceedings of the 2023 IEEE Biomedical Circuits and Systems Conference (BioCAS)
Place of PublicationDanvers
PublisherIEEE
Number of pages5
ISBN (Electronic)979-8-3503-0026-0
ISBN (Print)979-8-3503-0027-7
DOIs
Publication statusPublished - 2023
Event2023 IEEE Biomedical Circuits and Systems Conference (BioCAS) - Toronto, Canada
Duration: 19 Oct 202321 Oct 2023

Conference

Conference2023 IEEE Biomedical Circuits and Systems Conference (BioCAS)
Country/TerritoryCanada
City Toronto
Period19/10/2321/10/23

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Power supplies
  • Power system management
  • Rectifiers
  • Neuroprostheses
  • Electrical stimulation
  • Topology
  • Safety
  • electrical stimulation
  • neuromodulation
  • regulating rectifier

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