Multi-channel signal generator ASIC for acoustic holograms

Song, R., Richard, G. , Cheng, C. Y.-Y., Teng, L., Qiu, Y. , Lavery, M. P.J. , Trolier-McKinstry, S., Cochran, S. and Underwood, I. (2020) Multi-channel signal generator ASIC for acoustic holograms. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 67(1), pp. 49-56. (doi: 10.1109/TUFFC.2019.2938917)

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Abstract

A CMOS application-specific integrated circuit (ASIC) has been developed to generate arbitrary, dynamic phase patterns for acoustic hologram applications. An experimental prototype has been fabricated to demonstrate phase shaping. It comprises a cascadable 1 × 9 array of identical, independently-controlled signal generators implemented in a 0.35 μ m minimum feature size process. It can individually control the phase of a square wave on each of the nine output pads. The footprint of the integrated circuit is 1175 × 88 μ m2. A 128 MHz clock frequency is used to produce outputs at 8 MHz with phase resolution of 16 levels (4-bit) per channel. A 6 × 6 air-coupled matrix array ultrasonic transducer was built and driven by four ASICs, with the help of commercial buffer amplifiers, for the application demonstration. Acoustic pressure mapping and particle manipulation were performed. Additionally, a 2 × 2 array piezoelectric micromachined ultrasonic transducer (PMUT) was connected and driven by four output channels of a single ASIC, demonstrating the flexibility of the ASIC to work with different transducers and the potential for direct integration of CMOS and PMUTs.

Item Type:Articles
Additional Information:CMOS fabrication was partly funded under the EPSRC Programme Grant "Implantable Microsystems for Personalised Anti-Cancer Therapy (IMPACT)" (EP/K034510/1). We gratefully acknowledge the expert assistance of Andrew Bunting of the University of Edinburgh and Nicola Fenu and Nathan Giles-Donovan of the University of Glasgow. This work was also supported in part by The Center for Nanoscale Science, a Materials Research Science and Engineering Center (MRSEC) supported by the National Science Foundation under grant DMR-1420620. Christopher Cheng was supported by the National Defense Science & Engineering Graduate (NDSEG) Fellowship Program. Grace Richard and Martin P.J. Lavery are supported by the Royal Academy of Engineering and the UK Engineering and Physical Sciences Research Council (EPSRC) under grant EP/N032853/1.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lavery, Professor Martin and Cochran, Professor Sandy and Qiu, Dr Yongqiang and Richard, Grace and Cheng, Christopher
Authors: Song, R., Richard, G., Cheng, C. Y.-Y., Teng, L., Qiu, Y., Lavery, M. P.J., Trolier-McKinstry, S., Cochran, S., and Underwood, I.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Publisher:IEEE
ISSN:0885-3010
ISSN (Online):1525-8955
Published Online:02 September 2019
Copyright Holders:Copyright © 2019 IEEE
First Published:First published in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 67(1): 49-56
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
712491High Dimensional Free-space Building-to-Building Link for Last-Mile CommunicationsMartin LaveryEngineering and Physical Sciences Research Council (EPSRC)EP/N032853/1ENG - ENGINEERING ELECTRONICS & NANO ENG