An Energy-efficient Wirelessly Powered Millimeter-scale Neurostimulator with Optimized Inductive Loop Antenna and Custom Rectifier

Hongming Lyu, Jigong Wang, Jun-Ho La, Jin Chung, Aydin Babakhani

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

Abstract

This paper presents a wirelessly powered millimeter-scale neurostimulator based on an integrated circuit (IC) that is co-designed with an inductive loop antenna. The circuit uses a positive feedback to generate output stimuli eliminating the need for any control blocks. Low-voltage and high-voltage versions of the circuit are discussed, which can generate 1 V and 2 V stimulation intensities, respectively. The low-voltage design is implemented in a 180 nm CMOS process and occupies an area of 1 mm x 0.2 mm (including pads). A systematic co-design procedure is presented to optimize the rectifier and the inductive loop antenna, rendering the stimulator assembly to occupy an area of 5 mm x 7.5 mm. The stimulator was fully implanted on a rat sciatic nerve 2 cm under the skin and successfully excited the axons. A multi-receiver energy transfer system is further presented targeting future in-body sensor networks.

Original languageEnglish (US)
Title of host publicationProceedings of the 2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1401-1404
Number of pages4
Volume2018-June
ISBN (Print)9781538650677
DOIs
StatePublished - Aug 17 2018
Event2018 IEEE/MTT-S International Microwave Symposium, IMS 2018 - Philadelphia, United States
Duration: Jun 10 2018Jun 15 2018

Other

Other2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
CountryUnited States
CityPhiladelphia
Period6/10/186/15/18

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Keywords

  • implantable medical device
  • inductive coupling
  • neurostimulator
  • rectifier
  • wireless power transfer

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Lyu, H., Wang, J., La, J-H., Chung, J., & Babakhani, A. (2018). An Energy-efficient Wirelessly Powered Millimeter-scale Neurostimulator with Optimized Inductive Loop Antenna and Custom Rectifier. In Proceedings of the 2018 IEEE/MTT-S International Microwave Symposium, IMS 2018 (Vol. 2018-June, pp. 1401-1404). [8439143] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSYM.2018.8439143