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 language | English (US) |
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Title of host publication | Proceedings of the 2018 IEEE/MTT-S International Microwave Symposium, IMS 2018 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 1401-1404 |
Number of pages | 4 |
Volume | 2018-June |
ISBN (Print) | 9781538650677 |
DOIs | |
State | Published - Aug 17 2018 |
Event | 2018 IEEE/MTT-S International Microwave Symposium, IMS 2018 - Philadelphia, United States Duration: Jun 10 2018 → Jun 15 2018 |
Other
Other | 2018 IEEE/MTT-S International Microwave Symposium, IMS 2018 |
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Country/Territory | United States |
City | Philadelphia |
Period | 6/10/18 → 6/15/18 |
Keywords
- implantable medical device
- inductive coupling
- neurostimulator
- rectifier
- wireless power transfer
ASJC Scopus subject areas
- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering