Print Email Facebook Twitter A High-Frequency Beamforming Channel for Ultrasound Stimulation and Ultrasonic Powering 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 arrayultrasound transducersultrasound stimulationultrasonically poweredultrasound neuromodulationphased array beamformerhigh-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 Files PDF A_High_Frequency_Beamform ... wering.pdf 6.21 MB Close viewer /islandora/object/uuid:d7d49fcb-4f03-4ec7-b742-9a763ebe27c5/datastream/OBJ/view