TY - JOUR
T1 - Gastric seed
T2 - Toward distributed ultrasonically interrogated millimeter-sized implants for large-scale gastric electrical-wave recording
AU - Meng, Miao
AU - Kiani, Mehdi
N1 - Funding Information:
Manuscript received February 24, 2019; accepted March 25, 2019. Date of publication March 28, 2019; date of current version April 30, 2019. This work was supported in part by the National Institutes of Health under Grant NIBIB-U18EB021789. This brief was recommended by Associate Editor B. Zhao. (Corresponding author: Mehdi Kiani.) The authors are with the Electrical Engineering Department, Pennsylvania State University, University Park, PA 16802 USA (e-mail: mkiani@psu.edu).
Publisher Copyright:
© 2004-2012 IEEE.
PY - 2019/5
Y1 - 2019/5
N2 - 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.
AB - 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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U2 - 10.1109/TCSII.2019.2908072
DO - 10.1109/TCSII.2019.2908072
M3 - Article
C2 - 31866772
AN - SCOPUS:85065450917
SN - 1549-7747
VL - 66
SP - 783
EP - 787
JO - IEEE Transactions on Circuits and Systems II: Express Briefs
JF - IEEE Transactions on Circuits and Systems II: Express Briefs
IS - 5
M1 - 8676006
ER -