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

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

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.

原文English
主出版物標題2015 IEEE International Ultrasonics Symposium, IUS 2015
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9781479981823
DOIs
出版狀態Published - 2015 十一月 13
事件IEEE International Ultrasonics Symposium, IUS 2015 - Taipei, Taiwan
持續時間: 2015 十月 212015 十月 24

出版系列

名字2015 IEEE International Ultrasonics Symposium, IUS 2015

Other

OtherIEEE International Ultrasonics Symposium, IUS 2015
國家Taiwan
城市Taipei
期間15-10-2115-10-24

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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