An all-digital and high-resolution transmit-beamforming ASIC for high-frequency and portable ultrasound imaging systems

Duo Sheng, Zong Ru Yang, Yi Shang Wang, Chih-Chung Huang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In this paper, an all-digital and high-resolution transmit-beamforming circuit for high-frequency ultrasound imaging systems is presented. Conventional transmit-beamformers are typically implemented via field programmable gate arrays (FPGAs). However, the delay resolution and chip size of FPGAs is unable to meet the requirements of high-frequency and portable ultrasound imaging systems. The proposed transmit beamformer comprises an all-digital delay-locked loop (ADDLL) and a beamforming delay line (BDL). The proposed digitally-controlled delay cell in ADDLL and BDL comprises a ladder-shaped delay stage and an interpolation delay stage, which extends the delay range and improves the delay resolution, respectively. The proposed transmit beamformer is implemented in 0.18 μm CMOS technology and integrated with a 30-MHz high-frequency linear array. The simulation results show that each channel can be programmed to achieve a maximum time delay of 439 ns with a resolution of 441 ps. In addition, the lateral resolution at 5, 7.5, and 10 mm is 39.2, 43.4, and 60.1 μm, respectively.

Original languageEnglish
Title of host publication2015 IEEE International Ultrasonics Symposium, IUS 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479981823
DOIs
Publication statusPublished - 2015 Nov 13
EventIEEE International Ultrasonics Symposium, IUS 2015 - Taipei, Taiwan
Duration: 2015 Oct 212015 Oct 24

Publication series

Name2015 IEEE International Ultrasonics Symposium, IUS 2015

Other

OtherIEEE International Ultrasonics Symposium, IUS 2015
CountryTaiwan
CityTaipei
Period15-10-2115-10-24

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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