Gastric seed: Toward distributed ultrasonically interrogated millimeter-sized implants for large-scale gastric electrical-wave recording

Miao Meng, Mehdi Kiani

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This brief presents the concept of Gastric Seed, which is an ultrasonically interrogated millimeter-sized implant for gastric electrical-wave [also known as slow waves (SWs)] recording. A network of Gastric Seeds can be endoscopically implanted within the stomach submucosal space for large-scale SW recording. This brief also summarizes our recent effort toward Gastric Seed development including ultrasonic (US) self-regulated power management and addressable US pulse-based data transfer. The proposed power management in the form of a voltage doubler only requires a single off-chip capacitor for simultaneous rectification, regulation and over-voltage protection (OVP) by utilizing US transducer's internal capacitance and reverse current. For data transfer, sharp US pulses are transmitted to reduce the implant's power consumption. A proof-of-concept addressable chip was fabricated in a 0.35-μm standard CMOS process. Utilizing two pairs of millimeter-sized stacked power/data US transducers spaced by 3.75 cm in a water tank, the chip achieved measured regulated voltage of 3 V and data rate of 75 kb/s with the data transmitter energy consumption of 440 pJ/bit.

Original languageEnglish (US)
Article number8676006
Pages (from-to)783-787
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume66
Issue number5
DOIs
StatePublished - May 1 2019

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Seed
Ultrasonic transducers
Ultrasonics
Data transfer
Overvoltage protection
Water tanks
Electric potential
Transmitters
Electric power utilization
Capacitors
Capacitance
Energy utilization
Power management

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

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abstract = "This brief presents the concept of Gastric Seed, which is an ultrasonically interrogated millimeter-sized implant for gastric electrical-wave [also known as slow waves (SWs)] recording. A network of Gastric Seeds can be endoscopically implanted within the stomach submucosal space for large-scale SW recording. This brief also summarizes our recent effort toward Gastric Seed development including ultrasonic (US) self-regulated power management and addressable US pulse-based data transfer. The proposed power management in the form of a voltage doubler only requires a single off-chip capacitor for simultaneous rectification, regulation and over-voltage protection (OVP) by utilizing US transducer's internal capacitance and reverse current. For data transfer, sharp US pulses are transmitted to reduce the implant's power consumption. A proof-of-concept addressable chip was fabricated in a 0.35-μm standard CMOS process. Utilizing two pairs of millimeter-sized stacked power/data US transducers spaced by 3.75 cm in a water tank, the chip achieved measured regulated voltage of 3 V and data rate of 75 kb/s with the data transmitter energy consumption of 440 pJ/bit.",
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