Title
A High-Frequency Beamforming Channel for Ultrasound Stimulation and Ultrasonic Powering
Author
Rivandi, H. (TU Delft Bio-Electronics)
Ghosh, Ishaan (Student TU Delft)
Lopes Marta da Costa, T.M. (TU Delft Bio-Electronics)
Date
2022
Abstract
New non-imaging ultrasound applications, such as ultrasound stimulation and ultrasonic power transfer, need sub-millimeter volumetric spatial resolution, electronically control of the focal spot location, high ultrasound intensity, and a tiny form factor. Satisfying these requirements demands a high-frequency phased array ultrasound transducer. On the other hand, the pitch size in a phased array must be half of the sound wavelength to avoid grating lobes in the ultrasound beam profile. In other words, higher frequency results in a smaller available area to implement a high-voltage electronics beamforming channel. While prior efforts have reached a maximum frequency of 8.3 MHz, this work utilizes a low area high-voltage level shifter coupled with optimum phase wrapping to present two 15 MHz and 12 MHz pixel-level pitch-matched beamforming channels that deliver 20 V and 36 V to the ultrasound transducer load, respectively. Furthermore, the phase of the output is programmable with 3-bits resolution that allows fine control of focal spot location. The proposed beamforming channels have been implemented in 0.18-µm BCD technology and consume 960 µA and 1.23 mA from 20 V and 36 V power supplies, respectively.
Subject
ultrasound phased array
ultrasound transducers
ultrasound stimulation
ultrasonically powered
ultrasound neuromodulation
phased array beamformer
high-voltage beam-forming channel
To reference this document use:
http://resolver.tudelft.nl/uuid:d7d49fcb-4f03-4ec7-b742-9a763ebe27c5
DOI
https://doi.org/10.1109/BioCAS54905.2022.9948550
Publisher
IEEE
Embargo date
2023-07-01
ISBN
978-1-6654-6918-0
Source
Proceedings of the 2022 IEEE Biomedical Circuits and Systems Conference (BioCAS)
Event
2022 IEEE Biomedical Circuits and Systems Conference (BioCAS), 2022-10-13 → 2022-10-15, Taipei, Taiwan
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
conference paper
Rights
© 2022 H. Rivandi, Ishaan Ghosh, T.M. Lopes Marta da Costa