TY - GEN
T1 - Towards an Implantable Gastric Electrical-Wave Recording System Powered with Ultrasonic Beamforming
AU - Kashani, Zeinab
AU - Kiani, Mehdi
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Wireless real-time monitoring of underlying gastric electrical activity, called slow wave (SW), has the potential of detecting gastric dysrhythmia in various gastric disorders. To realize minimally invasive small gastric implants (i.e., Gastric Seeds) for high-resolution SW recording, an ultrasonic (US) wireless power and data transfer platform as well as a CMOS ASIC with low-frequency analog frontend and power management are required. This paper presents our recent progress towards the design and development of such core technologies for the Gastric Seed, including different low-noise amplifier structures for recording SW signals at ultralow frequencies (tens of mHz), US beamforming for powering a millimeter-sized implant, and integrated power-management for rectification, regulation, and over-voltage protection at 1.1 MHz. To achieve tens of mHz operation, four different amplifiers were fabricated in a 0.35-μm standard CMOS process, and their performance was measured. Also, a 32-element US array was optimized and simulated. This paper presents the functionality of these three core technologies individually through simulations and measurements, which will be integrated in future to realize a Gastric Seed, powered with US beam focusing and steering through beamforming.
AB - Wireless real-time monitoring of underlying gastric electrical activity, called slow wave (SW), has the potential of detecting gastric dysrhythmia in various gastric disorders. To realize minimally invasive small gastric implants (i.e., Gastric Seeds) for high-resolution SW recording, an ultrasonic (US) wireless power and data transfer platform as well as a CMOS ASIC with low-frequency analog frontend and power management are required. This paper presents our recent progress towards the design and development of such core technologies for the Gastric Seed, including different low-noise amplifier structures for recording SW signals at ultralow frequencies (tens of mHz), US beamforming for powering a millimeter-sized implant, and integrated power-management for rectification, regulation, and over-voltage protection at 1.1 MHz. To achieve tens of mHz operation, four different amplifiers were fabricated in a 0.35-μm standard CMOS process, and their performance was measured. Also, a 32-element US array was optimized and simulated. This paper presents the functionality of these three core technologies individually through simulations and measurements, which will be integrated in future to realize a Gastric Seed, powered with US beam focusing and steering through beamforming.
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U2 - 10.1109/BioCAS54905.2022.9948658
DO - 10.1109/BioCAS54905.2022.9948658
M3 - Conference contribution
AN - SCOPUS:85142932964
T3 - BioCAS 2022 - IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Systems for a Better Future, Proceedings
SP - 45
EP - 49
BT - BioCAS 2022 - IEEE Biomedical Circuits and Systems Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE Biomedical Circuits and Systems Conference, BioCAS 2022
Y2 - 13 October 2022 through 15 October 2022
ER -