A 5.37mW/Channel Pitch-Matched Ultrasound ASIC with Dynamic-Bit-Shared SAR ADC and 13.2V Charge-Recycling TX in Standard CMOS for Intracardiac Echocardiography

📋 论文概要

该论文针对心内超声心动图（ICE）系统，提出了一款低功耗、间距匹配的超声ASIC。通过采用动态位共享SAR ADC和13.2V电荷回收发射机，实现了每通道5.37mW的极低功耗，满足医疗成像对低噪声和低功耗的要求。

💡 主要创新点

• 提出了动态位共享SAR ADC技术，在低功耗下实现高精度模数转换
• 实现了13.2V电荷回收发射机，有效降低高压发射的功耗
• 采用间距匹配设计，优化了ASIC与超声换能器的集成性能

🏷 关键词

📄 原文摘要

Institute for Neurotechnology, Singapore, Singapore 1 2 Intracardiac echocardiography (ICE) is an ultrasound sonogram that visualizes the anatomical structure of the heart in real time, with a mm-scale catheter inserted through the intracardiac vessels, and guides surgical intervention for atrial septal defect (ASD) closure. To achieve high-quality medical imaging, an ICE system must meet stringent power consumption requirements with low-noise operation. Since an ASIC and ultrasound transducers are tightly bonded through flip-chip or direct integration, an ultrasound unit TRX channel must be pitchmatched to each transducer channel [1,2]. A piezoelectric Micromachined Ultrasound Transducer (pMUT) is a suitable ultrasound transducer for implantable

👥 作者与机构

Jihee Lee1, Kyoung-Rog Lee1, Benjamin E. Eovino2, Jeong Hoan Park3,

Liwei Lin2, Hoi-Jun Yoo1, Jerald Yoo3,4 KAIST, Daejeon, Korea University of California, Berkeley, CA 3 National University of Singapore, Singapore, Singapore 4 Singapore